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Finding the Fourth Proportional to 219.92, 329.85 and 57.61

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Solution

The fourth proportional to 219.92, 329.85 and 57.61 is: 86.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.92 : 329.85 = 57.61 : x
  2. Step 2: Convert to fraction form
    219.92/329.85 = 57.61/x
  3. Step 3: Cross multiply
    219.92x = 329.85 × 57.61
  4. Step 4: Simplify right side
    219.92x = 19,002.91
  5. Step 5: Solve for x
    x = 19,002.91/219.92
  6. Step 6: Final answer
    x = 86.41

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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.