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Finding the Third Proportional to 578.75 and 868.19

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Solution

The third proportional to 578.75 and 868.19 is: 1,302.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.75 : 868.19 = 868.19 : x
  2. Step 2: Convert to fraction form
    578.75/868.19 = 868.19/x
  3. Step 3: Cross multiply
    578.75x = 868.19 × 868.19
  4. Step 4: Simplify right side
    578.75x = 753,749.54
  5. Step 5: Solve for x
    x = 753,749.54/578.75
  6. Step 6: Final answer
    x = 1,302.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.