Finding the Fourth Proportional to 649,542,390.70, 974,313,586.05 and 442,918,129.90
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Solution
The fourth proportional to 649,542,390.70, 974,313,586.05 and 442,918,129.90 is: 664,377,194.85
Step by Step Solution
- Step 1: Write the proportion equation
649,542,390.70 : 974,313,586.05 = 442,918,129.90 : x - Step 2: Convert to fraction form
649,542,390.70/974,313,586.05 = 442,918,129.90/x - Step 3: Cross multiply
649,542,390.70x = 974,313,586.05 × 442,918,129.90 - Step 4: Simplify right side
649,542,390.70x = 431,541,151,469,428,672 - Step 5: Solve for x
x = 431,541,151,469,428,672/649,542,390.70 - Step 6: Final answer
x = 664,377,194.85
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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.