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Finding the Third Proportional to 127.75 and 268.75

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Solution

The third proportional to 127.75 and 268.75 is: 565.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.75 : 268.75 = 268.75 : x
  2. Step 2: Convert to fraction form
    127.75/268.75 = 268.75/x
  3. Step 3: Cross multiply
    127.75x = 268.75 × 268.75
  4. Step 4: Simplify right side
    127.75x = 72,226.56
  5. Step 5: Solve for x
    x = 72,226.56/127.75
  6. Step 6: Final answer
    x = 565.37

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.