directly proportional

American  

[di-rekt-lee-pruh-pawr-shuhn-uhl, dahy-] / dɪˈrɛkt li prəˈpɔr ʃən əl, daɪ- /

adjective

1. in direct proportion to another quantity; in a relation where the increase of one thing is accompanied by an increase in another, and vice versa. Compare inversely proportional.

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Example Sentences

Carbon footprint is directly proportional to gallons of gasoline burned, so the same ratio applies.

From The Wall Street Journal • Dec. 22, 2025

In 1929, Edwin Hubble discovered that galaxies in the universe were moving away from us at a rate directly proportional to the distance the galaxy was from Earth.

From Salon • Dec. 9, 2024

Nonlinearity in this context means that there is a significant shift, a jump in magnitude, in the light's behavior that is not directly proportional to its frequency, arising from its interaction with the material.

From Science Daily • Dec. 8, 2023

Over the years these cars have gotten bigger and so has their cost to the climate, as carbon dioxide emissions “are almost directly proportional to fuel use” for gas-powered cars.

From Seattle Times • Nov. 25, 2023

So it predicted that the red shift of a galaxy should be directly proportional to its distance from us, exactly as Hubble found.

From "A Brief History of Time: And Other Essays" by Stephen Hawking