Answer
200 ft, 300 ft, 425 ft
Work Step by Step
Write a proportion using the given scale. Cross multiply to solve for x.
$\frac{\frac{1}{4}in}{10ft}=\frac{5in}{x\ ft}$
$\frac{1}{4}\times x=5\times 10$
$\frac{1}{4}x=50$
$\frac{1}{4}x\times4=50\times4$
$x=200$
$\frac{\frac{1}{4}in}{10ft}=\frac{7\frac{1}{2}in}{x\ ft}$
$\frac{1}{4}\times x=7\frac{1}{2}\times 10$
$\frac{1}{4}\times x=\frac{15}{2}\times 10$
$\frac{1}{4}\times x=\frac{150}{2}$
$\frac{1}{4}x=75$
$\frac{1}{4}x\times4=75\times4$
$x=300$
$\frac{\frac{1}{4}in}{10ft}=\frac{10\frac{5}{8}in}{x\ ft}$
$\frac{1}{4}\times x=10\frac{5}{8}\times 10$
$\frac{1}{4}\times x=\frac{85}{8}\times 10$
$\frac{1}{4}\times x=\frac{850}{8}$
$\frac{1}{4}x=\frac{850}{/\!\!4\times2}\times/\!\!\!4$
$\frac{1}{4}x\times4=\frac{850}{2}$
$x=425$
