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Finding the Fourth Proportional to 391,963.64, 587,944.26 and 107,654.43

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Solution

The fourth proportional to 391,963.64, 587,944.26 and 107,654.43 is: 161,481.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,963.64 : 587,944.26 = 107,654.43 : x
  2. Step 2: Convert to fraction form
    391,963.64/587,944.26 = 107,654.43/x
  3. Step 3: Cross multiply
    391,963.64x = 587,944.26 × 107,654.43
  4. Step 4: Simplify right side
    391,963.64x = 63,294,806,386.86
  5. Step 5: Solve for x
    x = 63,294,806,386.86/391,963.64
  6. Step 6: Final answer
    x = 161,481.32

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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.