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Finding the Fourth Proportional to 709,895.92, 979,648.95 and 387,605.02

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Solution

The fourth proportional to 709,895.92, 979,648.95 and 387,605.02 is: 534,890.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,895.92 : 979,648.95 = 387,605.02 : x
  2. Step 2: Convert to fraction form
    709,895.92/979,648.95 = 387,605.02/x
  3. Step 3: Cross multiply
    709,895.92x = 979,648.95 × 387,605.02
  4. Step 4: Simplify right side
    709,895.92x = 379,716,850,857.73
  5. Step 5: Solve for x
    x = 379,716,850,857.73/709,895.92
  6. Step 6: Final answer
    x = 534,890.88

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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.