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Finding the Third Proportional to 28 and 43.25

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Solution

The third proportional to 28 and 43.25 is: 66.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28 : 43.25 = 43.25 : x
  2. Step 2: Convert to fraction form
    28/43.25 = 43.25/x
  3. Step 3: Cross multiply
    28x = 43.25 × 43.25
  4. Step 4: Simplify right side
    28x = 1,870.56
  5. Step 5: Solve for x
    x = 1,870.56/28
  6. Step 6: Final answer
    x = 66.81

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.