Finding the Fourth Proportional to 766,387,771.70, 1,149,581,657.55 and 721,038,139.70
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Solution
The fourth proportional to 766,387,771.70, 1,149,581,657.55 and 721,038,139.70 is: 1,081,557,209.55
Step by Step Solution
- Step 1: Write the proportion equation
766,387,771.70 : 1,149,581,657.55 = 721,038,139.70 : x - Step 2: Convert to fraction form
766,387,771.70/1,149,581,657.55 = 721,038,139.70/x - Step 3: Cross multiply
766,387,771.70x = 1,149,581,657.55 × 721,038,139.70 - Step 4: Simplify right side
766,387,771.70x = 828,892,219,793,094,528 - Step 5: Solve for x
x = 828,892,219,793,094,528/766,387,771.70 - Step 6: Final answer
x = 1,081,557,209.55
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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.