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Finding the Third Proportional to 113.91 and 180.98

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Solution

The third proportional to 113.91 and 180.98 is: 287.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.91 : 180.98 = 180.98 : x
  2. Step 2: Convert to fraction form
    113.91/180.98 = 180.98/x
  3. Step 3: Cross multiply
    113.91x = 180.98 × 180.98
  4. Step 4: Simplify right side
    113.91x = 32,755.34
  5. Step 5: Solve for x
    x = 32,755.34/113.91
  6. Step 6: Final answer
    x = 287.56

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.