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Finding the Fourth Proportional to 636,253.60, 878,046.74 and 349,780.90

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Solution

The fourth proportional to 636,253.60, 878,046.74 and 349,780.90 is: 482,706.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,253.60 : 878,046.74 = 349,780.90 : x
  2. Step 2: Convert to fraction form
    636,253.60/878,046.74 = 349,780.90/x
  3. Step 3: Cross multiply
    636,253.60x = 878,046.74 × 349,780.90
  4. Step 4: Simplify right side
    636,253.60x = 307,123,978,959.27
  5. Step 5: Solve for x
    x = 307,123,978,959.27/636,253.60
  6. Step 6: Final answer
    x = 482,706.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.