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Finding the Third Proportional to 3,969 and 4,286.25

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Solution

The third proportional to 3,969 and 4,286.25 is: 4,628.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,969 : 4,286.25 = 4,286.25 : x
  2. Step 2: Convert to fraction form
    3,969/4,286.25 = 4,286.25/x
  3. Step 3: Cross multiply
    3,969x = 4,286.25 × 4,286.25
  4. Step 4: Simplify right side
    3,969x = 18,371,939.06
  5. Step 5: Solve for x
    x = 18,371,939.06/3,969
  6. Step 6: Final answer
    x = 4,628.86

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Why These Related Problems?

These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.