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Finding the Fourth Proportional to 220.11, 329.55 and 165.84

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Solution

The fourth proportional to 220.11, 329.55 and 165.84 is: 248.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.11 : 329.55 = 165.84 : x
  2. Step 2: Convert to fraction form
    220.11/329.55 = 165.84/x
  3. Step 3: Cross multiply
    220.11x = 329.55 × 165.84
  4. Step 4: Simplify right side
    220.11x = 54,652.57
  5. Step 5: Solve for x
    x = 54,652.57/220.11
  6. Step 6: Final answer
    x = 248.30

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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.