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Finding the Fourth Proportional to 663,476.31, 915,616.80 and 377,008.47

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Solution

The fourth proportional to 663,476.31, 915,616.80 and 377,008.47 is: 520,282.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,476.31 : 915,616.80 = 377,008.47 : x
  2. Step 2: Convert to fraction form
    663,476.31/915,616.80 = 377,008.47/x
  3. Step 3: Cross multiply
    663,476.31x = 915,616.80 × 377,008.47
  4. Step 4: Simplify right side
    663,476.31x = 345,195,288,874.30
  5. Step 5: Solve for x
    x = 345,195,288,874.30/663,476.31
  6. Step 6: Final answer
    x = 520,282.76

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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.