Home / 3,321.80-4,982.70-2,787.20

Finding the Fourth Proportional to 3,321.80, 4,982.70 and 2,787.20

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Solution

The fourth proportional to 3,321.80, 4,982.70 and 2,787.20 is: 4,180.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,321.80 : 4,982.70 = 2,787.20 : x
  2. Step 2: Convert to fraction form
    3,321.80/4,982.70 = 2,787.20/x
  3. Step 3: Cross multiply
    3,321.80x = 4,982.70 × 2,787.20
  4. Step 4: Simplify right side
    3,321.80x = 13,887,781.44
  5. Step 5: Solve for x
    x = 13,887,781.44/3,321.80
  6. Step 6: Final answer
    x = 4,180.80

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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.