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Finding the Fourth Proportional to 396,989.22, 595,149.11 and 172,180.40

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Solution

The fourth proportional to 396,989.22, 595,149.11 and 172,180.40 is: 258,125.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,989.22 : 595,149.11 = 172,180.40 : x
  2. Step 2: Convert to fraction form
    396,989.22/595,149.11 = 172,180.40/x
  3. Step 3: Cross multiply
    396,989.22x = 595,149.11 × 172,180.40
  4. Step 4: Simplify right side
    396,989.22x = 102,473,010,958.54
  5. Step 5: Solve for x
    x = 102,473,010,958.54/396,989.22
  6. Step 6: Final answer
    x = 258,125.42

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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.