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Finding the Third Proportional to 2,728 and 3,880

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Solution

The third proportional to 2,728 and 3,880 is: 5,518.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,728 : 3,880 = 3,880 : x
  2. Step 2: Convert to fraction form
    2,728/3,880 = 3,880/x
  3. Step 3: Cross multiply
    2,728x = 3,880 × 3,880
  4. Step 4: Simplify right side
    2,728x = 15,054,400
  5. Step 5: Solve for x
    x = 15,054,400/2,728
  6. Step 6: Final answer
    x = 5,518.48

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.