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Finding the Third Proportional to 6.25 and 8.75

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Solution

The third proportional to 6.25 and 8.75 is: 12.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    6.25 : 8.75 = 8.75 : x
  2. Step 2: Convert to fraction form
    6.25/8.75 = 8.75/x
  3. Step 3: Cross multiply
    6.25x = 8.75 × 8.75
  4. Step 4: Simplify right side
    6.25x = 76.56
  5. Step 5: Solve for x
    x = 76.56/6.25
  6. Step 6: Final answer
    x = 12.25

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.