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Finding the Fourth Proportional to 219.78, 329.27 and 196.97

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Solution

The fourth proportional to 219.78, 329.27 and 196.97 is: 295.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.78 : 329.27 = 196.97 : x
  2. Step 2: Convert to fraction form
    219.78/329.27 = 196.97/x
  3. Step 3: Cross multiply
    219.78x = 329.27 × 196.97
  4. Step 4: Simplify right side
    219.78x = 64,853.68
  5. Step 5: Solve for x
    x = 64,853.68/219.78
  6. Step 6: Final answer
    x = 295.08

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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.