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Finding the Third Proportional to 124.78 and 249.56

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Solution

The third proportional to 124.78 and 249.56 is: 499.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.78 : 249.56 = 249.56 : x
  2. Step 2: Convert to fraction form
    124.78/249.56 = 249.56/x
  3. Step 3: Cross multiply
    124.78x = 249.56 × 249.56
  4. Step 4: Simplify right side
    124.78x = 62,281.44
  5. Step 5: Solve for x
    x = 62,281.44/124.78
  6. Step 6: Final answer
    x = 499.13

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Why These Related Problems?

These problems maintain the same ratio (2) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.