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Finding the Fourth Proportional to 2,584.61, 3,876.21 and 1,123.41

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Solution

The fourth proportional to 2,584.61, 3,876.21 and 1,123.41 is: 1,684.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,584.61 : 3,876.21 = 1,123.41 : x
  2. Step 2: Convert to fraction form
    2,584.61/3,876.21 = 1,123.41/x
  3. Step 3: Cross multiply
    2,584.61x = 3,876.21 × 1,123.41
  4. Step 4: Simplify right side
    2,584.61x = 4,354,573.08
  5. Step 5: Solve for x
    x = 4,354,573.08/2,584.61
  6. Step 6: Final answer
    x = 1,684.81

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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.