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Finding the Third Proportional to 394.13 and 609.94

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Solution

The third proportional to 394.13 and 609.94 is: 943.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.13 : 609.94 = 609.94 : x
  2. Step 2: Convert to fraction form
    394.13/609.94 = 609.94/x
  3. Step 3: Cross multiply
    394.13x = 609.94 × 609.94
  4. Step 4: Simplify right side
    394.13x = 372,023.75
  5. Step 5: Solve for x
    x = 372,023.75/394.13
  6. Step 6: Final answer
    x = 943.92

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.