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Finding the Third Proportional to 518.13 and 808.75

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Solution

The third proportional to 518.13 and 808.75 is: 1,262.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.13 : 808.75 = 808.75 : x
  2. Step 2: Convert to fraction form
    518.13/808.75 = 808.75/x
  3. Step 3: Cross multiply
    518.13x = 808.75 × 808.75
  4. Step 4: Simplify right side
    518.13x = 654,076.56
  5. Step 5: Solve for x
    x = 654,076.56/518.13
  6. Step 6: Final answer
    x = 1,262.39

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.