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Finding the Third Proportional to 1,399 and 2,761

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Solution

The third proportional to 1,399 and 2,761 is: 5,448.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399 : 2,761 = 2,761 : x
  2. Step 2: Convert to fraction form
    1,399/2,761 = 2,761/x
  3. Step 3: Cross multiply
    1,399x = 2,761 × 2,761
  4. Step 4: Simplify right side
    1,399x = 7,623,121
  5. Step 5: Solve for x
    x = 7,623,121/1,399
  6. Step 6: Final answer
    x = 5,448.98

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Why These Related Problems?

These problems maintain the same ratio (1.97) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.