Question

the diagram shows the length and width of a cell phone, and the length of a larger version of the same brand of cell phone.5.4 in.2.6 in.6.21 in.the lengths and widths of the two cell phones are proportional. what is the width, in inches, of the larger version of the cell phone?a 1.15b 2.26c 2.99d 3.41

Explanation:

Step1: Set up proportionality equation

Let $w$ = width of larger phone.
$$\frac{5.4}{6.21} = \frac{2.6}{w}$$

Step2: Cross-multiply to solve for $w$

$$5.4w = 2.6 \times 6.21$$

Step3: Calculate right-hand side

$$2.6 \times 6.21 = 16.146$$

Step4: Isolate $w$

$$w = \frac{16.146}{5.4}$$

Step5: Compute final value

$$w = 2.99$$

Answer:

C. 2.99