Answer
$\frac{7}{4}$; Third Property of Proportions
Work Step by Step
The Third Property of Proportions states $\frac{a}{b}$=$\frac{c}{d}$ is equivalent to $\frac{a+b}{b}$=$\frac{c+d}{d}$
You are given $\frac{a}{b}$=$\frac{3}{4}$
Therefore $\frac{a+b}{b}$=$\frac{3+4}{4}$ or
$\frac{a+b}{b}$ = $\frac{7}{4}$
