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Finding the Fourth Proportional to 402,472.60, 603,708.90 and 215,848.60

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Solution

The fourth proportional to 402,472.60, 603,708.90 and 215,848.60 is: 323,772.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,472.60 : 603,708.90 = 215,848.60 : x
  2. Step 2: Convert to fraction form
    402,472.60/603,708.90 = 215,848.60/x
  3. Step 3: Cross multiply
    402,472.60x = 603,708.90 × 215,848.60
  4. Step 4: Simplify right side
    402,472.60x = 130,309,720,872.54
  5. Step 5: Solve for x
    x = 130,309,720,872.54/402,472.60
  6. Step 6: Final answer
    x = 323,772.90

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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.