Finding the Fourth Proportional to 420,723,691.70, 631,153,350.96 and 129,590,679.08
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Solution
The fourth proportional to 420,723,691.70, 631,153,350.96 and 129,590,679.08 is: 194,406,906.40
Step by Step Solution
- Step 1: Write the proportion equation
420,723,691.70 : 631,153,350.96 = 129,590,679.08 : x - Step 2: Convert to fraction form
420,723,691.70/631,153,350.96 = 129,590,679.08/x - Step 3: Cross multiply
420,723,691.70x = 631,153,350.96 × 129,590,679.08 - Step 4: Simplify right side
420,723,691.70x = 81,791,591,354,523,968 - Step 5: Solve for x
x = 81,791,591,354,523,968/420,723,691.70 - Step 6: Final answer
x = 194,406,906.40
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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.