having due proportion; corresponding.
being in or characterized by proportion.
of, pertaining to, or based on proportion; relative.
4. Mathematics. a.
(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.
(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; Middle English proporcional Related forms
< Latin prōportiōnālis.
1. harmonious, comparative, accordant, consonant, proportionate.