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Finding the Third Proportional to 2,755 and 3,157

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Solution

The third proportional to 2,755 and 3,157 is: 3,617.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,755 : 3,157 = 3,157 : x
  2. Step 2: Convert to fraction form
    2,755/3,157 = 3,157/x
  3. Step 3: Cross multiply
    2,755x = 3,157 × 3,157
  4. Step 4: Simplify right side
    2,755x = 9,966,649
  5. Step 5: Solve for x
    x = 9,966,649/2,755
  6. Step 6: Final answer
    x = 3,617.66

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Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.