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Finding the Third Proportional to 189.38 and 395.94

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Solution

The third proportional to 189.38 and 395.94 is: 827.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.38 : 395.94 = 395.94 : x
  2. Step 2: Convert to fraction form
    189.38/395.94 = 395.94/x
  3. Step 3: Cross multiply
    189.38x = 395.94 × 395.94
  4. Step 4: Simplify right side
    189.38x = 156,766.50
  5. Step 5: Solve for x
    x = 156,766.50/189.38
  6. Step 6: Final answer
    x = 827.81

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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.