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Finding the Third Proportional to 2,079 and 3,945

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Solution

The third proportional to 2,079 and 3,945 is: 7,485.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,079 : 3,945 = 3,945 : x
  2. Step 2: Convert to fraction form
    2,079/3,945 = 3,945/x
  3. Step 3: Cross multiply
    2,079x = 3,945 × 3,945
  4. Step 4: Simplify right side
    2,079x = 15,563,025
  5. Step 5: Solve for x
    x = 15,563,025/2,079
  6. Step 6: Final answer
    x = 7,485.82

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Why These Related Problems?

These problems maintain the same ratio (1.90) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.