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Finding the Third Proportional to 815 and 1,751

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Solution

The third proportional to 815 and 1,751 is: 3,761.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    815 : 1,751 = 1,751 : x
  2. Step 2: Convert to fraction form
    815/1,751 = 1,751/x
  3. Step 3: Cross multiply
    815x = 1,751 × 1,751
  4. Step 4: Simplify right side
    815x = 3,066,001
  5. Step 5: Solve for x
    x = 3,066,001/815
  6. Step 6: Final answer
    x = 3,761.96

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.