In art, body proportions are the study of relation of human body parts to each other and the whole, essential for depiction of human figure.
In typography, a proportional font is a font whose glyphs are displayed using varying widths.
In the Just war theory, proportionality is one of the conditions.
This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. If an article link referred you here, you might want to go back and fix it to point directly to the intended page.
If you travel at a constant speed, then the distance traveled is proportional to the time spent traveling, with the speed being the constant of proportionality.
The circumference of a circle is proportional to its diameter, with the constant of proportionality equal to π.
The amount of force acting on a certain object from the gravity of the Earth at sea level is proportional to the object's mass, with the gravitational constant being the constant of proportionality.