Question

Ratio and proportion: 0.8:10 :: x:100?
1) x=0.8
2) x=8
3) x=80
4) x=800

Answer 1

4 x=800 and x50 divided by 0.8 is 8

Answer 2

To solve the proportion 0.8:10 :: x:100, cross-multiply 0.8 * 100 = 10 * x and then solve for x.

Step-by-step explanation:

To solve the given proportion 0.8:10 :: x:100, we can start by setting up the ratio equal to the unit scale. The ratio 0.8:10 can be written as 0.8/10. We want to find x, so we set up the proportion as 0.8/10 = x/100.

To solve for x, we can cross-multiply and then divide. Cross-multiplying gives us 0.8 * 100 = 10 * x. Simplifying gives us 80 = 10x. Dividing both sides by 10, we find that x = 8.

Therefore, the correct answer is option 2) x = 8.