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Finding the Third Proportional to 2,665 and 3,145

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Solution

The third proportional to 2,665 and 3,145 is: 3,711.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,665 : 3,145 = 3,145 : x
  2. Step 2: Convert to fraction form
    2,665/3,145 = 3,145/x
  3. Step 3: Cross multiply
    2,665x = 3,145 × 3,145
  4. Step 4: Simplify right side
    2,665x = 9,891,025
  5. Step 5: Solve for x
    x = 9,891,025/2,665
  6. Step 6: Final answer
    x = 3,711.45

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.