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Finding the Third Proportional to 126.25 and 278

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Solution

The third proportional to 126.25 and 278 is: 612.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.25 : 278 = 278 : x
  2. Step 2: Convert to fraction form
    126.25/278 = 278/x
  3. Step 3: Cross multiply
    126.25x = 278 × 278
  4. Step 4: Simplify right side
    126.25x = 77,284
  5. Step 5: Solve for x
    x = 77,284/126.25
  6. Step 6: Final answer
    x = 612.15

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.