proportional
UK: prəˈpɔːʃənl | US: prəˈpɔːrʃənl
adj. corresponding in size or amount to something else
adj. having a constant ratio or relation
n. a quantity or variable in proportion
The word "proportional" derives from the Latin proportio, combining pro- (forward, for) and portio (part, share). The suffix -al (from Latin -alis) forms adjectives meaning "pertaining to." Originally used in mathematics to describe ratios, it expanded to general contexts where relationships between parts are emphasized. The morpheme portion retains its core meaning of "part," while pro- reinforces the idea of forward or relational comparison.
The salary increase was proportional to the employee's performance.
The graph shows a proportional relationship between time and distance.
In art, proportional balance is essential for harmony.
The tax rate is proportional to income levels.
The recipe requires proportional amounts of flour and sugar.