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Finding the Fourth Proportional to 217.28, 299.85 and 134.38

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Solution

The fourth proportional to 217.28, 299.85 and 134.38 is: 185.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.28 : 299.85 = 134.38 : x
  2. Step 2: Convert to fraction form
    217.28/299.85 = 134.38/x
  3. Step 3: Cross multiply
    217.28x = 299.85 × 134.38
  4. Step 4: Simplify right side
    217.28x = 40,292.78
  5. Step 5: Solve for x
    x = 40,292.78/217.28
  6. Step 6: Final answer
    x = 185.44

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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.