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Finding the Third Proportional to 45.28 and 98.79

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Solution

The third proportional to 45.28 and 98.79 is: 215.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.28 : 98.79 = 98.79 : x
  2. Step 2: Convert to fraction form
    45.28/98.79 = 98.79/x
  3. Step 3: Cross multiply
    45.28x = 98.79 × 98.79
  4. Step 4: Simplify right side
    45.28x = 9,759.28
  5. Step 5: Solve for x
    x = 9,759.28/45.28
  6. Step 6: Final answer
    x = 215.53

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.