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Finding the Third Proportional to 20.65 and 45.56

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Solution

The third proportional to 20.65 and 45.56 is: 100.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.65 : 45.56 = 45.56 : x
  2. Step 2: Convert to fraction form
    20.65/45.56 = 45.56/x
  3. Step 3: Cross multiply
    20.65x = 45.56 × 45.56
  4. Step 4: Simplify right side
    20.65x = 2,075.94
  5. Step 5: Solve for x
    x = 2,075.94/20.65
  6. Step 6: Final answer
    x = 100.55

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Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.