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Finding the Fourth Proportional to 219.39, 329.12 and 97.65

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Solution

The fourth proportional to 219.39, 329.12 and 97.65 is: 146.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.39 : 329.12 = 97.65 : x
  2. Step 2: Convert to fraction form
    219.39/329.12 = 97.65/x
  3. Step 3: Cross multiply
    219.39x = 329.12 × 97.65
  4. Step 4: Simplify right side
    219.39x = 32,138.57
  5. Step 5: Solve for x
    x = 32,138.57/219.39
  6. Step 6: Final answer
    x = 146.49

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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.