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Finding the Third Proportional to 961.75 and 2,115.25

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Solution

The third proportional to 961.75 and 2,115.25 is: 4,652.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.75 : 2,115.25 = 2,115.25 : x
  2. Step 2: Convert to fraction form
    961.75/2,115.25 = 2,115.25/x
  3. Step 3: Cross multiply
    961.75x = 2,115.25 × 2,115.25
  4. Step 4: Simplify right side
    961.75x = 4,474,282.56
  5. Step 5: Solve for x
    x = 4,474,282.56/961.75
  6. Step 6: Final answer
    x = 4,652.23

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.