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Finding the Fourth Proportional to 220.97, 330.02 and 188.12

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Solution

The fourth proportional to 220.97, 330.02 and 188.12 is: 280.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.97 : 330.02 = 188.12 : x
  2. Step 2: Convert to fraction form
    220.97/330.02 = 188.12/x
  3. Step 3: Cross multiply
    220.97x = 330.02 × 188.12
  4. Step 4: Simplify right side
    220.97x = 62,084.22
  5. Step 5: Solve for x
    x = 62,084.22/220.97
  6. Step 6: Final answer
    x = 280.96

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.