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Finding the Third Proportional to 812.25 and 1,257.19

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Solution

The third proportional to 812.25 and 1,257.19 is: 1,945.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    812.25 : 1,257.19 = 1,257.19 : x
  2. Step 2: Convert to fraction form
    812.25/1,257.19 = 1,257.19/x
  3. Step 3: Cross multiply
    812.25x = 1,257.19 × 1,257.19
  4. Step 4: Simplify right side
    812.25x = 1,580,520.41
  5. Step 5: Solve for x
    x = 1,580,520.41/812.25
  6. Step 6: Final answer
    x = 1,945.85

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.