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Finding the Third Proportional to 812 and 892

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Solution

The third proportional to 812 and 892 is: 979.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    812 : 892 = 892 : x
  2. Step 2: Convert to fraction form
    812/892 = 892/x
  3. Step 3: Cross multiply
    812x = 892 × 892
  4. Step 4: Simplify right side
    812x = 795,664
  5. Step 5: Solve for x
    x = 795,664/812
  6. Step 6: Final answer
    x = 979.88

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Why These Related Problems?

These problems maintain the same ratio (1.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.