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Finding the Fourth Proportional to 425,920.26, 638,693.26 and 159,493.90

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Solution

The fourth proportional to 425,920.26, 638,693.26 and 159,493.90 is: 239,170.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,920.26 : 638,693.26 = 159,493.90 : x
  2. Step 2: Convert to fraction form
    425,920.26/638,693.26 = 159,493.90/x
  3. Step 3: Cross multiply
    425,920.26x = 638,693.26 × 159,493.90
  4. Step 4: Simplify right side
    425,920.26x = 101,867,678,941.11
  5. Step 5: Solve for x
    x = 101,867,678,941.11/425,920.26
  6. Step 6: Final answer
    x = 239,170.78

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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.