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Finding the Fourth Proportional to 2,586.29, 3,879.44 and 854.91

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Solution

The fourth proportional to 2,586.29, 3,879.44 and 854.91 is: 1,282.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,586.29 : 3,879.44 = 854.91 : x
  2. Step 2: Convert to fraction form
    2,586.29/3,879.44 = 854.91/x
  3. Step 3: Cross multiply
    2,586.29x = 3,879.44 × 854.91
  4. Step 4: Simplify right side
    2,586.29x = 3,316,567.78
  5. Step 5: Solve for x
    x = 3,316,567.78/2,586.29
  6. Step 6: Final answer
    x = 1,282.37

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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.