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Finding the Fourth Proportional to 217.82, 327.21 and 132.38

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Solution

The fourth proportional to 217.82, 327.21 and 132.38 is: 198.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.82 : 327.21 = 132.38 : x
  2. Step 2: Convert to fraction form
    217.82/327.21 = 132.38/x
  3. Step 3: Cross multiply
    217.82x = 327.21 × 132.38
  4. Step 4: Simplify right side
    217.82x = 43,316.06
  5. Step 5: Solve for x
    x = 43,316.06/217.82
  6. Step 6: Final answer
    x = 198.86

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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.