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Finding the Third Proportional to 3,455 and 5,480

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Solution

The third proportional to 3,455 and 5,480 is: 8,691.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,455 : 5,480 = 5,480 : x
  2. Step 2: Convert to fraction form
    3,455/5,480 = 5,480/x
  3. Step 3: Cross multiply
    3,455x = 5,480 × 5,480
  4. Step 4: Simplify right side
    3,455x = 30,030,400
  5. Step 5: Solve for x
    x = 30,030,400/3,455
  6. Step 6: Final answer
    x = 8,691.87

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.