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Finding the Third Proportional to 118.31 and 180.19

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Solution

The third proportional to 118.31 and 180.19 is: 274.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.31 : 180.19 = 180.19 : x
  2. Step 2: Convert to fraction form
    118.31/180.19 = 180.19/x
  3. Step 3: Cross multiply
    118.31x = 180.19 × 180.19
  4. Step 4: Simplify right side
    118.31x = 32,467.54
  5. Step 5: Solve for x
    x = 32,467.54/118.31
  6. Step 6: Final answer
    x = 274.42

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.