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Finding the Third Proportional to 86 and 180

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Solution

The third proportional to 86 and 180 is: 376.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    86 : 180 = 180 : x
  2. Step 2: Convert to fraction form
    86/180 = 180/x
  3. Step 3: Cross multiply
    86x = 180 × 180
  4. Step 4: Simplify right side
    86x = 32,400
  5. Step 5: Solve for x
    x = 32,400/86
  6. Step 6: Final answer
    x = 376.74

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Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.