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Finding the Third Proportional to 389.25 and 534.38

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Solution

The third proportional to 389.25 and 534.38 is: 733.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.25 : 534.38 = 534.38 : x
  2. Step 2: Convert to fraction form
    389.25/534.38 = 534.38/x
  3. Step 3: Cross multiply
    389.25x = 534.38 × 534.38
  4. Step 4: Simplify right side
    389.25x = 285,556.64
  5. Step 5: Solve for x
    x = 285,556.64/389.25
  6. Step 6: Final answer
    x = 733.61

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.