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Finding the Third Proportional to 518.91 and 759.38

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Solution

The third proportional to 518.91 and 759.38 is: 1,111.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.91 : 759.38 = 759.38 : x
  2. Step 2: Convert to fraction form
    518.91/759.38 = 759.38/x
  3. Step 3: Cross multiply
    518.91x = 759.38 × 759.38
  4. Step 4: Simplify right side
    518.91x = 576,650.39
  5. Step 5: Solve for x
    x = 576,650.39/518.91
  6. Step 6: Final answer
    x = 1,111.28

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.