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Finding the Third Proportional to 20.82 and 45.65

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Solution

The third proportional to 20.82 and 45.65 is: 100.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.82 : 45.65 = 45.65 : x
  2. Step 2: Convert to fraction form
    20.82/45.65 = 45.65/x
  3. Step 3: Cross multiply
    20.82x = 45.65 × 45.65
  4. Step 4: Simplify right side
    20.82x = 2,084.06
  5. Step 5: Solve for x
    x = 2,084.06/20.82
  6. Step 6: Final answer
    x = 100.08

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.