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Finding the Fourth Proportional to 217.38, 299.89 and 133.32

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Solution

The fourth proportional to 217.38, 299.89 and 133.32 is: 183.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.38 : 299.89 = 133.32 : x
  2. Step 2: Convert to fraction form
    217.38/299.89 = 133.32/x
  3. Step 3: Cross multiply
    217.38x = 299.89 × 133.32
  4. Step 4: Simplify right side
    217.38x = 39,981.33
  5. Step 5: Solve for x
    x = 39,981.33/217.38
  6. Step 6: Final answer
    x = 183.92

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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.