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Finding the Third Proportional to 126 and 198

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Solution

The third proportional to 126 and 198 is: 311.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    126 : 198 = 198 : x
  2. Step 2: Convert to fraction form
    126/198 = 198/x
  3. Step 3: Cross multiply
    126x = 198 × 198
  4. Step 4: Simplify right side
    126x = 39,204
  5. Step 5: Solve for x
    x = 39,204/126
  6. Step 6: Final answer
    x = 311.14

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.