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Finding the Third Proportional to 3,960 and 4,760

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Solution

The third proportional to 3,960 and 4,760 is: 5,721.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,960 : 4,760 = 4,760 : x
  2. Step 2: Convert to fraction form
    3,960/4,760 = 4,760/x
  3. Step 3: Cross multiply
    3,960x = 4,760 × 4,760
  4. Step 4: Simplify right side
    3,960x = 22,657,600
  5. Step 5: Solve for x
    x = 22,657,600/3,960
  6. Step 6: Final answer
    x = 5,721.62

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Why These Related Problems?

These problems maintain the same ratio (1.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.