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Finding the Third Proportional to 331.31 and 712.97

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Solution

The third proportional to 331.31 and 712.97 is: 1,534.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.31 : 712.97 = 712.97 : x
  2. Step 2: Convert to fraction form
    331.31/712.97 = 712.97/x
  3. Step 3: Cross multiply
    331.31x = 712.97 × 712.97
  4. Step 4: Simplify right side
    331.31x = 508,324.44
  5. Step 5: Solve for x
    x = 508,324.44/331.31
  6. Step 6: Final answer
    x = 1,534.27

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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.