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Finding the Fourth Proportional to 2,589.88, 3,883.82 and 858.04

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Solution

The fourth proportional to 2,589.88, 3,883.82 and 858.04 is: 1,286.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,589.88 : 3,883.82 = 858.04 : x
  2. Step 2: Convert to fraction form
    2,589.88/3,883.82 = 858.04/x
  3. Step 3: Cross multiply
    2,589.88x = 3,883.82 × 858.04
  4. Step 4: Simplify right side
    2,589.88x = 3,332,472.91
  5. Step 5: Solve for x
    x = 3,332,472.91/2,589.88
  6. Step 6: Final answer
    x = 1,286.73

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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.