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Finding the Fourth Proportional to 396,989.72, 595,149.85 and 172,180.90

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Solution

The fourth proportional to 396,989.72, 595,149.85 and 172,180.90 is: 258,126.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,989.72 : 595,149.85 = 172,180.90 : x
  2. Step 2: Convert to fraction form
    396,989.72/595,149.85 = 172,180.90/x
  3. Step 3: Cross multiply
    396,989.72x = 595,149.85 × 172,180.90
  4. Step 4: Simplify right side
    396,989.72x = 102,473,436,807.87
  5. Step 5: Solve for x
    x = 102,473,436,807.87/396,989.72
  6. Step 6: Final answer
    x = 258,126.17

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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.