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Finding the Third Proportional to 2.75 and 5.25

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Solution

The third proportional to 2.75 and 5.25 is: 10.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.75 : 5.25 = 5.25 : x
  2. Step 2: Convert to fraction form
    2.75/5.25 = 5.25/x
  3. Step 3: Cross multiply
    2.75x = 5.25 × 5.25
  4. Step 4: Simplify right side
    2.75x = 27.56
  5. Step 5: Solve for x
    x = 27.56/2.75
  6. Step 6: Final answer
    x = 10.02

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Why These Related Problems?

These problems maintain the same ratio (1.91) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.