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Finding the Fourth Proportional to 391,309.11, 586,710.95 and 124,981.11

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Solution

The fourth proportional to 391,309.11, 586,710.95 and 124,981.11 is: 187,390.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,309.11 : 586,710.95 = 124,981.11 : x
  2. Step 2: Convert to fraction form
    391,309.11/586,710.95 = 124,981.11/x
  3. Step 3: Cross multiply
    391,309.11x = 586,710.95 × 124,981.11
  4. Step 4: Simplify right side
    391,309.11x = 73,327,785,155.25
  5. Step 5: Solve for x
    x = 73,327,785,155.25/391,309.11
  6. Step 6: Final answer
    x = 187,390.95

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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.