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Finding the Fourth Proportional to 391,364.33, 587,037.27 and 125,127.15

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Solution

The fourth proportional to 391,364.33, 587,037.27 and 125,127.15 is: 187,687.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,364.33 : 587,037.27 = 125,127.15 : x
  2. Step 2: Convert to fraction form
    391,364.33/587,037.27 = 125,127.15/x
  3. Step 3: Cross multiply
    391,364.33x = 587,037.27 × 125,127.15
  4. Step 4: Simplify right side
    391,364.33x = 73,454,303,759.84
  5. Step 5: Solve for x
    x = 73,454,303,759.84/391,364.33
  6. Step 6: Final answer
    x = 187,687.78

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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.