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Finding the Fourth Proportional to 239.84, 331.11 and 161.27

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Solution

The fourth proportional to 239.84, 331.11 and 161.27 is: 222.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.84 : 331.11 = 161.27 : x
  2. Step 2: Convert to fraction form
    239.84/331.11 = 161.27/x
  3. Step 3: Cross multiply
    239.84x = 331.11 × 161.27
  4. Step 4: Simplify right side
    239.84x = 53,396.45
  5. Step 5: Solve for x
    x = 53,396.45/239.84
  6. Step 6: Final answer
    x = 222.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.