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Finding the Third Proportional to 25.50 and 27.75

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Solution

The third proportional to 25.50 and 27.75 is: 30.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.50 : 27.75 = 27.75 : x
  2. Step 2: Convert to fraction form
    25.50/27.75 = 27.75/x
  3. Step 3: Cross multiply
    25.50x = 27.75 × 27.75
  4. Step 4: Simplify right side
    25.50x = 770.06
  5. Step 5: Solve for x
    x = 770.06/25.50
  6. Step 6: Final answer
    x = 30.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.