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proportional

[pruh-pawr-shuh-nl, -pohr-] /prəˈpɔr ʃə nl, -ˈpoʊr-/
adjective
1.
having due proportion; corresponding.
2.
being in or characterized by proportion.
3.
of, relating to, or based on proportion; relative.
4.
Mathematics.
  1. (of two quantities) having the same or a constant ratio or relation:
    The quantities y and x are proportional if y/x = k, where k is the constant of proportionality.
  2. (of a first quantity with respect to a second quantity) a constant multiple of:
    The quantity y is proportional to x if y = kx, where k is the constant of proportionality.
Origin
1350-1400
1350-1400; Middle English proporcional < Latin prōportiōnālis. See proportion, -al1
Related forms
proportionality, noun
proportionally, adverb
interproportional, adjective
nonproportional, adjective
nonproportionally, adverb
subproportional, adjective
subproportionally, adverb
unproportional, adjective
unproportionally, adverb
Can be confused
proportional, proportionate.
Synonyms
1. harmonious, comparative, accordant, consonant, proportionate.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for proportionality
  • As previous commentators have said, it's all about proportionality.
  • proportionality arguments are always strongly overstated.
  • But familiar as it is, proportionality is a slippery idea.
  • But governments have a duty to acquire as much information as they can consistent with that proportionality.
  • It is a matter of fundamental fairness and proportionality in sentences.
  • Clearly, transistor density and heat dissipation do not exhibit an inverse proportionality relationship.
  • These include such principles as advance notice, discrimination in selecting targets and proportionality.
  • The constant of proportionality is the cosmological constant.
  • What strikes me in such statements is absence of proportionality.
British Dictionary definitions for proportionality

proportional

/prəˈpɔːʃənəl/
adjective
1.
of, involving, or being in proportion
2.
(maths) having or related by a constant ratio
noun
3.
(maths) an unknown term in a proportion: in a/b = c/x, x is the fourth proportional
Derived Forms
proportionality, noun
proportionally, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for proportionality
n.

1560s, from French proportionalité (14c.) or directly from Medieval Latin proportionalitas, from proportio (see proportion).

proportional

adj.

late 14c. (implied in proportionally), from Late Latin proportionalis "pertaining to proportions," from proportio (see proportion). Related: Proportionally.

Online Etymology Dictionary, © 2010 Douglas Harper
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