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Finding the Third Proportional to 2,668 and 3,118

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Solution

The third proportional to 2,668 and 3,118 is: 3,643.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,668 : 3,118 = 3,118 : x
  2. Step 2: Convert to fraction form
    2,668/3,118 = 3,118/x
  3. Step 3: Cross multiply
    2,668x = 3,118 × 3,118
  4. Step 4: Simplify right side
    2,668x = 9,721,924
  5. Step 5: Solve for x
    x = 9,721,924/2,668
  6. Step 6: Final answer
    x = 3,643.90

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Why These Related Problems?

These problems maintain the same ratio (1.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.