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Finding the Fourth Proportional to 323,575.20, 485,526.90 and 218,172.78

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Solution

The fourth proportional to 323,575.20, 485,526.90 and 218,172.78 is: 327,369.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,575.20 : 485,526.90 = 218,172.78 : x
  2. Step 2: Convert to fraction form
    323,575.20/485,526.90 = 218,172.78/x
  3. Step 3: Cross multiply
    323,575.20x = 485,526.90 × 218,172.78
  4. Step 4: Simplify right side
    323,575.20x = 105,928,753,537.78
  5. Step 5: Solve for x
    x = 105,928,753,537.78/323,575.20
  6. Step 6: Final answer
    x = 327,369.82

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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.