Finding the Fourth Proportional to 664,524,138.30, 996,786,207.45 and 392,426,346.30
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Solution
The fourth proportional to 664,524,138.30, 996,786,207.45 and 392,426,346.30 is: 588,639,519.45
Step by Step Solution
- Step 1: Write the proportion equation
664,524,138.30 : 996,786,207.45 = 392,426,346.30 : x - Step 2: Convert to fraction form
664,524,138.30/996,786,207.45 = 392,426,346.30/x - Step 3: Cross multiply
664,524,138.30x = 996,786,207.45 × 392,426,346.30 - Step 4: Simplify right side
664,524,138.30x = 391,165,169,431,837,376 - Step 5: Solve for x
x = 391,165,169,431,837,376/664,524,138.30 - Step 6: Final answer
x = 588,639,519.45
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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.