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Finding the Third Proportional to 28.50 and 60.75

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Solution

The third proportional to 28.50 and 60.75 is: 129.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28.50 : 60.75 = 60.75 : x
  2. Step 2: Convert to fraction form
    28.50/60.75 = 60.75/x
  3. Step 3: Cross multiply
    28.50x = 60.75 × 60.75
  4. Step 4: Simplify right side
    28.50x = 3,690.56
  5. Step 5: Solve for x
    x = 3,690.56/28.50
  6. Step 6: Final answer
    x = 129.49

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.