Home / 3,321.20-4,985.40-1,863.20

Finding the Fourth Proportional to 3,321.20, 4,985.40 and 1,863.20

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Solution

The fourth proportional to 3,321.20, 4,985.40 and 1,863.20 is: 2,796.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,321.20 : 4,985.40 = 1,863.20 : x
  2. Step 2: Convert to fraction form
    3,321.20/4,985.40 = 1,863.20/x
  3. Step 3: Cross multiply
    3,321.20x = 4,985.40 × 1,863.20
  4. Step 4: Simplify right side
    3,321.20x = 9,288,797.28
  5. Step 5: Solve for x
    x = 9,288,797.28/3,321.20
  6. Step 6: Final answer
    x = 2,796.82

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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.