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Finding the Fourth Proportional to 396,079.76, 594,242.20 and 129,842.32

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Solution

The fourth proportional to 396,079.76, 594,242.20 and 129,842.32 is: 194,803.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,079.76 : 594,242.20 = 129,842.32 : x
  2. Step 2: Convert to fraction form
    396,079.76/594,242.20 = 129,842.32/x
  3. Step 3: Cross multiply
    396,079.76x = 594,242.20 × 129,842.32
  4. Step 4: Simplify right side
    396,079.76x = 77,157,785,889.90
  5. Step 5: Solve for x
    x = 77,157,785,889.90/396,079.76
  6. Step 6: Final answer
    x = 194,803.66

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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.