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Finding the Third Proportional to 862.59 and 1,290.66

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Solution

The third proportional to 862.59 and 1,290.66 is: 1,931.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    862.59 : 1,290.66 = 1,290.66 : x
  2. Step 2: Convert to fraction form
    862.59/1,290.66 = 1,290.66/x
  3. Step 3: Cross multiply
    862.59x = 1,290.66 × 1,290.66
  4. Step 4: Simplify right side
    862.59x = 1,665,793.56
  5. Step 5: Solve for x
    x = 1,665,793.56/862.59
  6. Step 6: Final answer
    x = 1,931.14

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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.