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Finding the Third Proportional to 126.21 and 276.75

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Solution

The third proportional to 126.21 and 276.75 is: 606.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.21 : 276.75 = 276.75 : x
  2. Step 2: Convert to fraction form
    126.21/276.75 = 276.75/x
  3. Step 3: Cross multiply
    126.21x = 276.75 × 276.75
  4. Step 4: Simplify right side
    126.21x = 76,590.56
  5. Step 5: Solve for x
    x = 76,590.56/126.21
  6. Step 6: Final answer
    x = 606.85

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.