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Finding the Third Proportional to 511.13 and 679.69

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Solution

The third proportional to 511.13 and 679.69 is: 903.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.13 : 679.69 = 679.69 : x
  2. Step 2: Convert to fraction form
    511.13/679.69 = 679.69/x
  3. Step 3: Cross multiply
    511.13x = 679.69 × 679.69
  4. Step 4: Simplify right side
    511.13x = 461,975.10
  5. Step 5: Solve for x
    x = 461,975.10/511.13
  6. Step 6: Final answer
    x = 903.84

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.