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Finding the Third Proportional to 118 and 310.75

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Solution

The third proportional to 118 and 310.75 is: 818.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    118 : 310.75 = 310.75 : x
  2. Step 2: Convert to fraction form
    118/310.75 = 310.75/x
  3. Step 3: Cross multiply
    118x = 310.75 × 310.75
  4. Step 4: Simplify right side
    118x = 96,565.56
  5. Step 5: Solve for x
    x = 96,565.56/118
  6. Step 6: Final answer
    x = 818.35

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Why These Related Problems?

These problems maintain the same ratio (2.63) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.