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Finding the Third Proportional to 394.88 and 538.31

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Solution

The third proportional to 394.88 and 538.31 is: 733.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.88 : 538.31 = 538.31 : x
  2. Step 2: Convert to fraction form
    394.88/538.31 = 538.31/x
  3. Step 3: Cross multiply
    394.88x = 538.31 × 538.31
  4. Step 4: Simplify right side
    394.88x = 289,780.35
  5. Step 5: Solve for x
    x = 289,780.35/394.88
  6. Step 6: Final answer
    x = 733.85

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.