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Finding the Fourth Proportional to 323,781.24, 485,373.78 and 218,636.76

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Solution

The fourth proportional to 323,781.24, 485,373.78 and 218,636.76 is: 327,753.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,781.24 : 485,373.78 = 218,636.76 : x
  2. Step 2: Convert to fraction form
    323,781.24/485,373.78 = 218,636.76/x
  3. Step 3: Cross multiply
    323,781.24x = 485,373.78 × 218,636.76
  4. Step 4: Simplify right side
    323,781.24x = 106,120,550,648.15
  5. Step 5: Solve for x
    x = 106,120,550,648.15/323,781.24
  6. Step 6: Final answer
    x = 327,753.86

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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.