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Finding the Fourth Proportional to 239.04, 330.24 and 217.92

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Solution

The fourth proportional to 239.04, 330.24 and 217.92 is: 301.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.04 : 330.24 = 217.92 : x
  2. Step 2: Convert to fraction form
    239.04/330.24 = 217.92/x
  3. Step 3: Cross multiply
    239.04x = 330.24 × 217.92
  4. Step 4: Simplify right side
    239.04x = 71,965.90
  5. Step 5: Solve for x
    x = 71,965.90/239.04
  6. Step 6: Final answer
    x = 301.06

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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.