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Finding the Fourth Proportional to 391,318.16, 586,948.55 and 125,007.17

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Solution

The fourth proportional to 391,318.16, 586,948.55 and 125,007.17 is: 187,501.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,318.16 : 586,948.55 = 125,007.17 : x
  2. Step 2: Convert to fraction form
    391,318.16/586,948.55 = 125,007.17/x
  3. Step 3: Cross multiply
    391,318.16x = 586,948.55 × 125,007.17
  4. Step 4: Simplify right side
    391,318.16x = 73,372,773,611.32
  5. Step 5: Solve for x
    x = 73,372,773,611.32/391,318.16
  6. Step 6: Final answer
    x = 187,501.58

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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.