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Finding the Third Proportional to 275.44 and 426.56

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Solution

The third proportional to 275.44 and 426.56 is: 660.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.44 : 426.56 = 426.56 : x
  2. Step 2: Convert to fraction form
    275.44/426.56 = 426.56/x
  3. Step 3: Cross multiply
    275.44x = 426.56 × 426.56
  4. Step 4: Simplify right side
    275.44x = 181,955.57
  5. Step 5: Solve for x
    x = 181,955.57/275.44
  6. Step 6: Final answer
    x = 660.61

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.