# Multiplication and division with straightedge and compass

Level pending

Given three lengths, $$a,b,c$$, is it possible to construct a fourth length $$d$$ such that

$d=\frac{ab}{c}$

using only a straightedge and compass?

All terminology in this question is explained in the first note of my straightedge and compass set. More straightedge and compass constructions can be found there.

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