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Finding the Fourth Proportional to 396,129.64, 546,728.76 and 235,073.50

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Solution

The fourth proportional to 396,129.64, 546,728.76 and 235,073.50 is: 324,442.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,129.64 : 546,728.76 = 235,073.50 : x
  2. Step 2: Convert to fraction form
    396,129.64/546,728.76 = 235,073.50/x
  3. Step 3: Cross multiply
    396,129.64x = 546,728.76 × 235,073.50
  4. Step 4: Simplify right side
    396,129.64x = 128,521,443,163.86
  5. Step 5: Solve for x
    x = 128,521,443,163.86/396,129.64
  6. Step 6: Final answer
    x = 324,442.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.