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Finding the Fourth Proportional to 391,581.07, 587,084.32 and 125,188.27

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Solution

The fourth proportional to 391,581.07, 587,084.32 and 125,188.27 is: 187,690.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,581.07 : 587,084.32 = 125,188.27 : x
  2. Step 2: Convert to fraction form
    391,581.07/587,084.32 = 125,188.27/x
  3. Step 3: Cross multiply
    391,581.07x = 587,084.32 × 125,188.27
  4. Step 4: Simplify right side
    391,581.07x = 73,496,070,364.93
  5. Step 5: Solve for x
    x = 73,496,070,364.93/391,581.07
  6. Step 6: Final answer
    x = 187,690.56

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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.