# Arithmetic proportion

From Encyclopedia of Mathematics

An equation of the form

$$a-b=c-d,$$

where $a,b,c,d$ are given numbers. An arithmetic proportion is also called a difference proportion.

**How to Cite This Entry:**

Arithmetic proportion.

*Encyclopedia of Mathematics.*URL: http://www.encyclopediaofmath.org/index.php?title=Arithmetic_proportion&oldid=31656