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Finding the Fourth Proportional to 391,431.80, 587,144.56 and 232,608.44

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Solution

The fourth proportional to 391,431.80, 587,144.56 and 232,608.44 is: 348,910.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,431.80 : 587,144.56 = 232,608.44 : x
  2. Step 2: Convert to fraction form
    391,431.80/587,144.56 = 232,608.44/x
  3. Step 3: Cross multiply
    391,431.80x = 587,144.56 × 232,608.44
  4. Step 4: Simplify right side
    391,431.80x = 136,574,780,156.09
  5. Step 5: Solve for x
    x = 136,574,780,156.09/391,431.80
  6. Step 6: Final answer
    x = 348,910.79

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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.