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Finding the Third Proportional to 871.75 and 2,020.75

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Solution

The third proportional to 871.75 and 2,020.75 is: 4,684.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    871.75 : 2,020.75 = 2,020.75 : x
  2. Step 2: Convert to fraction form
    871.75/2,020.75 = 2,020.75/x
  3. Step 3: Cross multiply
    871.75x = 2,020.75 × 2,020.75
  4. Step 4: Simplify right side
    871.75x = 4,083,430.56
  5. Step 5: Solve for x
    x = 4,083,430.56/871.75
  6. Step 6: Final answer
    x = 4,684.18

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Why These Related Problems?

These problems maintain the same ratio (2.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.