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Finding the Fourth Proportional to 391,747.60, 588,235.80 and 225,859.60

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Solution

The fourth proportional to 391,747.60, 588,235.80 and 225,859.60 is: 339,143.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,747.60 : 588,235.80 = 225,859.60 : x
  2. Step 2: Convert to fraction form
    391,747.60/588,235.80 = 225,859.60/x
  3. Step 3: Cross multiply
    391,747.60x = 588,235.80 × 225,859.60
  4. Step 4: Simplify right side
    391,747.60x = 132,858,702,493.68
  5. Step 5: Solve for x
    x = 132,858,702,493.68/391,747.60
  6. Step 6: Final answer
    x = 339,143.63

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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.