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Finding the Fourth Proportional to 636,436.32, 878,285.28 and 349,974.88

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Solution

The fourth proportional to 636,436.32, 878,285.28 and 349,974.88 is: 482,967.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,436.32 : 878,285.28 = 349,974.88 : x
  2. Step 2: Convert to fraction form
    636,436.32/878,285.28 = 349,974.88/x
  3. Step 3: Cross multiply
    636,436.32x = 878,285.28 × 349,974.88
  4. Step 4: Simplify right side
    636,436.32x = 307,377,785,473.77
  5. Step 5: Solve for x
    x = 307,377,785,473.77/636,436.32
  6. Step 6: Final answer
    x = 482,967.07

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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.