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Finding the Fourth Proportional to 221.82, 331.89 and 149.32

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Solution

The fourth proportional to 221.82, 331.89 and 149.32 is: 223.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.82 : 331.89 = 149.32 : x
  2. Step 2: Convert to fraction form
    221.82/331.89 = 149.32/x
  3. Step 3: Cross multiply
    221.82x = 331.89 × 149.32
  4. Step 4: Simplify right side
    221.82x = 49,557.81
  5. Step 5: Solve for x
    x = 49,557.81/221.82
  6. Step 6: Final answer
    x = 223.41

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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.