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Finding the Fourth Proportional to 3,321.92, 4,978.20 and 2,393.12

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Solution

The fourth proportional to 3,321.92, 4,978.20 and 2,393.12 is: 3,586.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,321.92 : 4,978.20 = 2,393.12 : x
  2. Step 2: Convert to fraction form
    3,321.92/4,978.20 = 2,393.12/x
  3. Step 3: Cross multiply
    3,321.92x = 4,978.20 × 2,393.12
  4. Step 4: Simplify right side
    3,321.92x = 11,913,429.98
  5. Step 5: Solve for x
    x = 11,913,429.98/3,321.92
  6. Step 6: Final answer
    x = 3,586.31

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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.