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Finding the Third Proportional to 84.75 and 180.75

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Solution

The third proportional to 84.75 and 180.75 is: 385.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.75 : 180.75 = 180.75 : x
  2. Step 2: Convert to fraction form
    84.75/180.75 = 180.75/x
  3. Step 3: Cross multiply
    84.75x = 180.75 × 180.75
  4. Step 4: Simplify right side
    84.75x = 32,670.56
  5. Step 5: Solve for x
    x = 32,670.56/84.75
  6. Step 6: Final answer
    x = 385.49

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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.