Chapter 7.2, Problem 37PPS

To determine

To find: The dimensions of the projected image.

Answer to Problem 37PPS

The dimensions of the projected image is $52\text{ in}\text{.}\times \text{37 in}\text{.}$

Explanation of Solution

Given:

The photos are 13 inches by 9(1/4) inches on computer screen.

The ratio is 1:4

Calculation:

Let w is the width and l is the length.

From the proportions:

  $\begin{array}{c}\frac{1}{4}=\frac{13}{w}\\ w=13\left(4\right)\\ =52\end{array}$

And,

  $\begin{array}{c}\frac{1}{4}=\frac{9\frac{1}{4}}{l}\\ \frac{l}{4}=\frac{37}{4}\\ l=37\end{array}$

Thus, the dimensions of the projected image is $52\text{ in}\text{.}\times \text{37 in}\text{.}$