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Finding the Fourth Proportional to 396,389.76, 547,472.34 and 261,029.04

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Solution

The fourth proportional to 396,389.76, 547,472.34 and 261,029.04 is: 360,519.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,389.76 : 547,472.34 = 261,029.04 : x
  2. Step 2: Convert to fraction form
    396,389.76/547,472.34 = 261,029.04/x
  3. Step 3: Cross multiply
    396,389.76x = 547,472.34 × 261,029.04
  4. Step 4: Simplify right side
    396,389.76x = 142,906,179,336.75
  5. Step 5: Solve for x
    x = 142,906,179,336.75/396,389.76
  6. Step 6: Final answer
    x = 360,519.35

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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.