Finding the Fourth Proportional to 813,888,191.60, 1,220,832,287.40 and 782,143,449.20
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Solution
The fourth proportional to 813,888,191.60, 1,220,832,287.40 and 782,143,449.20 is: 1,173,215,173.80
Step by Step Solution
- Step 1: Write the proportion equation
813,888,191.60 : 1,220,832,287.40 = 782,143,449.20 : x - Step 2: Convert to fraction form
813,888,191.60/1,220,832,287.40 = 782,143,449.20/x - Step 3: Cross multiply
813,888,191.60x = 1,220,832,287.40 × 782,143,449.20 - Step 4: Simplify right side
813,888,191.60x = 954,865,976,161,761,792 - Step 5: Solve for x
x = 954,865,976,161,761,792/813,888,191.60 - Step 6: Final answer
x = 1,173,215,173.80
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Double scale
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Similar ratio
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.