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Finding the Fourth Proportional to 239.97, 361.25 and 217.62

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Solution

The fourth proportional to 239.97, 361.25 and 217.62 is: 327.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.97 : 361.25 = 217.62 : x
  2. Step 2: Convert to fraction form
    239.97/361.25 = 217.62/x
  3. Step 3: Cross multiply
    239.97x = 361.25 × 217.62
  4. Step 4: Simplify right side
    239.97x = 78,614.14
  5. Step 5: Solve for x
    x = 78,614.14/239.97
  6. Step 6: Final answer
    x = 327.60

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.