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Finding the Fourth Proportional to 391,373.52, 587,143.92 and 121,495.70

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Solution

The fourth proportional to 391,373.52, 587,143.92 and 121,495.70 is: 182,269.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,373.52 : 587,143.92 = 121,495.70 : x
  2. Step 2: Convert to fraction form
    391,373.52/587,143.92 = 121,495.70/x
  3. Step 3: Cross multiply
    391,373.52x = 587,143.92 × 121,495.70
  4. Step 4: Simplify right side
    391,373.52x = 71,335,461,561.14
  5. Step 5: Solve for x
    x = 71,335,461,561.14/391,373.52
  6. Step 6: Final answer
    x = 182,269.51

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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.