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Finding the Third Proportional to 2,679 and 3,869

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Solution

The third proportional to 2,679 and 3,869 is: 5,587.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,679 : 3,869 = 3,869 : x
  2. Step 2: Convert to fraction form
    2,679/3,869 = 3,869/x
  3. Step 3: Cross multiply
    2,679x = 3,869 × 3,869
  4. Step 4: Simplify right side
    2,679x = 14,969,161
  5. Step 5: Solve for x
    x = 14,969,161/2,679
  6. Step 6: Final answer
    x = 5,587.59

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Why These Related Problems?

These problems maintain the same ratio (1.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.