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Finding the Third Proportional to 125.75 and 258.13

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Solution

The third proportional to 125.75 and 258.13 is: 529.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.75 : 258.13 = 258.13 : x
  2. Step 2: Convert to fraction form
    125.75/258.13 = 258.13/x
  3. Step 3: Cross multiply
    125.75x = 258.13 × 258.13
  4. Step 4: Simplify right side
    125.75x = 66,628.52
  5. Step 5: Solve for x
    x = 66,628.52/125.75
  6. Step 6: Final answer
    x = 529.85

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.