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Finding the Fourth Proportional to 221.97, 331.71 and 181.44

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Solution

The fourth proportional to 221.97, 331.71 and 181.44 is: 271.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.97 : 331.71 = 181.44 : x
  2. Step 2: Convert to fraction form
    221.97/331.71 = 181.44/x
  3. Step 3: Cross multiply
    221.97x = 331.71 × 181.44
  4. Step 4: Simplify right side
    221.97x = 60,185.46
  5. Step 5: Solve for x
    x = 60,185.46/221.97
  6. Step 6: Final answer
    x = 271.14

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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.