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Finding the Fourth Proportional to 391,713.70, 587,584.47 and 125,439.61

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Solution

The fourth proportional to 391,713.70, 587,584.47 and 125,439.61 is: 188,163.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,713.70 : 587,584.47 = 125,439.61 : x
  2. Step 2: Convert to fraction form
    391,713.70/587,584.47 = 125,439.61/x
  3. Step 3: Cross multiply
    391,713.70x = 587,584.47 × 125,439.61
  4. Step 4: Simplify right side
    391,713.70x = 73,706,366,758.86
  5. Step 5: Solve for x
    x = 73,706,366,758.86/391,713.70
  6. Step 6: Final answer
    x = 188,163.87

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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.