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Finding the Fourth Proportional to 220.97, 331.61 and 134.48

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Solution

The fourth proportional to 220.97, 331.61 and 134.48 is: 201.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.97 : 331.61 = 134.48 : x
  2. Step 2: Convert to fraction form
    220.97/331.61 = 134.48/x
  3. Step 3: Cross multiply
    220.97x = 331.61 × 134.48
  4. Step 4: Simplify right side
    220.97x = 44,595.07
  5. Step 5: Solve for x
    x = 44,595.07/220.97
  6. Step 6: Final answer
    x = 201.81

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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.