Question

Solve for x in the following proportion?
1.6
722.5
0.4
10

Answer 1

Answer:

option D. 10

Step-by-step explanation:

$\frac{34}{85} = \frac{4}{x}\\\\34 \times x = 4 \times 85\\\\x = \frac{340}{34} = 10$

Answer 2

Answer:

x = 10

Step-by-step explanation:

$\dfrac{34}{85} = \dfrac{4}{x}$

Cross multiply.

34x = 4 × 85

34x = 340

Divide both sides by 34.

x = 10