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Finding the Fourth Proportional to 220.76, 331.10 and 92.44

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Solution

The fourth proportional to 220.76, 331.10 and 92.44 is: 138.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.76 : 331.10 = 92.44 : x
  2. Step 2: Convert to fraction form
    220.76/331.10 = 92.44/x
  3. Step 3: Cross multiply
    220.76x = 331.10 × 92.44
  4. Step 4: Simplify right side
    220.76x = 30,606.88
  5. Step 5: Solve for x
    x = 30,606.88/220.76
  6. Step 6: Final answer
    x = 138.64

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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.