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Finding the Third Proportional to 518.34 and 762.31

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Solution

The third proportional to 518.34 and 762.31 is: 1,121.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.34 : 762.31 = 762.31 : x
  2. Step 2: Convert to fraction form
    518.34/762.31 = 762.31/x
  3. Step 3: Cross multiply
    518.34x = 762.31 × 762.31
  4. Step 4: Simplify right side
    518.34x = 581,120.35
  5. Step 5: Solve for x
    x = 581,120.35/518.34
  6. Step 6: Final answer
    x = 1,121.11

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.