Meaning of PROPORTIONAL in English

[] n (14c): a number or quantity in a proportion

[2]proportional adj (15c) 1 a: corresponding in size, degree, or intensity b: having the same or a constant ratio "corresponding sides of similar triangles are ~"

2: regulated or determined in size or degree with reference to proportions "a ~ system of immigration quotas" -- n -- adv

Merriam-Webster English vocab.      Английский словарь Merriam Webster.