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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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British Dictionary definitions for interproportional

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
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Word Origin and History for interproportional

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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