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Finding the Fourth Proportional to 2,481.62, 3,722.76 and 921.42

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Solution

The fourth proportional to 2,481.62, 3,722.76 and 921.42 is: 1,382.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,481.62 : 3,722.76 = 921.42 : x
  2. Step 2: Convert to fraction form
    2,481.62/3,722.76 = 921.42/x
  3. Step 3: Cross multiply
    2,481.62x = 3,722.76 × 921.42
  4. Step 4: Simplify right side
    2,481.62x = 3,430,225.52
  5. Step 5: Solve for x
    x = 3,430,225.52/2,481.62
  6. Step 6: Final answer
    x = 1,382.26

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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.