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Finding the Fourth Proportional to 217.27, 326.31 and 178.84

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Solution

The fourth proportional to 217.27, 326.31 and 178.84 is: 268.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.27 : 326.31 = 178.84 : x
  2. Step 2: Convert to fraction form
    217.27/326.31 = 178.84/x
  3. Step 3: Cross multiply
    217.27x = 326.31 × 178.84
  4. Step 4: Simplify right side
    217.27x = 58,357.28
  5. Step 5: Solve for x
    x = 58,357.28/217.27
  6. Step 6: Final answer
    x = 268.59

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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.