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Finding the Fourth Proportional to 2,481.66, 3,722.50 and 838.21

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Solution

The fourth proportional to 2,481.66, 3,722.50 and 838.21 is: 1,257.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,481.66 : 3,722.50 = 838.21 : x
  2. Step 2: Convert to fraction form
    2,481.66/3,722.50 = 838.21/x
  3. Step 3: Cross multiply
    2,481.66x = 3,722.50 × 838.21
  4. Step 4: Simplify right side
    2,481.66x = 3,120,236.73
  5. Step 5: Solve for x
    x = 3,120,236.73/2,481.66
  6. Step 6: Final answer
    x = 1,257.32

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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.