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Finding the Third Proportional to 2,971 and 3,999

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Solution

The third proportional to 2,971 and 3,999 is: 5,382.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,971 : 3,999 = 3,999 : x
  2. Step 2: Convert to fraction form
    2,971/3,999 = 3,999/x
  3. Step 3: Cross multiply
    2,971x = 3,999 × 3,999
  4. Step 4: Simplify right side
    2,971x = 15,992,001
  5. Step 5: Solve for x
    x = 15,992,001/2,971
  6. Step 6: Final answer
    x = 5,382.70

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.