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Finding the Third Proportional to 28.50 and 66.75

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Solution

The third proportional to 28.50 and 66.75 is: 156.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28.50 : 66.75 = 66.75 : x
  2. Step 2: Convert to fraction form
    28.50/66.75 = 66.75/x
  3. Step 3: Cross multiply
    28.50x = 66.75 × 66.75
  4. Step 4: Simplify right side
    28.50x = 4,455.56
  5. Step 5: Solve for x
    x = 4,455.56/28.50
  6. Step 6: Final answer
    x = 156.34

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Why These Related Problems?

These problems maintain the same ratio (2.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.