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Finding the Fourth Proportional to 221.29, 331.89 and 112.99

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Solution

The fourth proportional to 221.29, 331.89 and 112.99 is: 169.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.29 : 331.89 = 112.99 : x
  2. Step 2: Convert to fraction form
    221.29/331.89 = 112.99/x
  3. Step 3: Cross multiply
    221.29x = 331.89 × 112.99
  4. Step 4: Simplify right side
    221.29x = 37,500.25
  5. Step 5: Solve for x
    x = 37,500.25/221.29
  6. Step 6: Final answer
    x = 169.46

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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.