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Finding the Fourth Proportional to 353,731.20, 530,414.40 and 104,380.80

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Solution

The fourth proportional to 353,731.20, 530,414.40 and 104,380.80 is: 156,517.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,731.20 : 530,414.40 = 104,380.80 : x
  2. Step 2: Convert to fraction form
    353,731.20/530,414.40 = 104,380.80/x
  3. Step 3: Cross multiply
    353,731.20x = 530,414.40 × 104,380.80
  4. Step 4: Simplify right side
    353,731.20x = 55,365,079,403.52
  5. Step 5: Solve for x
    x = 55,365,079,403.52/353,731.20
  6. Step 6: Final answer
    x = 156,517.38

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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.