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Finding the Fourth Proportional to 420,761.92, 580,627.72 and 239,517.96

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Solution

The fourth proportional to 420,761.92, 580,627.72 and 239,517.96 is: 330,521.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,761.92 : 580,627.72 = 239,517.96 : x
  2. Step 2: Convert to fraction form
    420,761.92/580,627.72 = 239,517.96/x
  3. Step 3: Cross multiply
    420,761.92x = 580,627.72 × 239,517.96
  4. Step 4: Simplify right side
    420,761.92x = 139,070,767,013.85
  5. Step 5: Solve for x
    x = 139,070,767,013.85/420,761.92
  6. Step 6: Final answer
    x = 330,521.28

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1.5x scale

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.