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Finding the Third Proportional to 868.88 and 1,911.38

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Solution

The third proportional to 868.88 and 1,911.38 is: 4,204.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.88 : 1,911.38 = 1,911.38 : x
  2. Step 2: Convert to fraction form
    868.88/1,911.38 = 1,911.38/x
  3. Step 3: Cross multiply
    868.88x = 1,911.38 × 1,911.38
  4. Step 4: Simplify right side
    868.88x = 3,653,354.39
  5. Step 5: Solve for x
    x = 3,653,354.39/868.88
  6. Step 6: Final answer
    x = 4,204.70

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.