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Finding the Fourth Proportional to 637,856.20, 955,472.10 and 438,401.80

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Solution

The fourth proportional to 637,856.20, 955,472.10 and 438,401.80 is: 656,700.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,856.20 : 955,472.10 = 438,401.80 : x
  2. Step 2: Convert to fraction form
    637,856.20/955,472.10 = 438,401.80/x
  3. Step 3: Cross multiply
    637,856.20x = 955,472.10 × 438,401.80
  4. Step 4: Simplify right side
    637,856.20x = 418,880,688,489.78
  5. Step 5: Solve for x
    x = 418,880,688,489.78/637,856.20
  6. Step 6: Final answer
    x = 656,700.82

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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.