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Finding the Fourth Proportional to 381,337.40, 572,006.10 and 319,129.40

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Solution

The fourth proportional to 381,337.40, 572,006.10 and 319,129.40 is: 478,694.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,337.40 : 572,006.10 = 319,129.40 : x
  2. Step 2: Convert to fraction form
    381,337.40/572,006.10 = 319,129.40/x
  3. Step 3: Cross multiply
    381,337.40x = 572,006.10 × 319,129.40
  4. Step 4: Simplify right side
    381,337.40x = 182,543,963,489.34
  5. Step 5: Solve for x
    x = 182,543,963,489.34/381,337.40
  6. Step 6: Final answer
    x = 478,694.10

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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.