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Finding the Third Proportional to 3,969 and 4,455

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Solution

The third proportional to 3,969 and 4,455 is: 5,000.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,969 : 4,455 = 4,455 : x
  2. Step 2: Convert to fraction form
    3,969/4,455 = 4,455/x
  3. Step 3: Cross multiply
    3,969x = 4,455 × 4,455
  4. Step 4: Simplify right side
    3,969x = 19,847,025
  5. Step 5: Solve for x
    x = 19,847,025/3,969
  6. Step 6: Final answer
    x = 5,000.51

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Why These Related Problems?

These problems maintain the same ratio (1.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.