Home / 2,119.80-3,183.30-1,392.60

Finding the Fourth Proportional to 2,119.80, 3,183.30 and 1,392.60

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Solution

The fourth proportional to 2,119.80, 3,183.30 and 1,392.60 is: 2,091.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,119.80 : 3,183.30 = 1,392.60 : x
  2. Step 2: Convert to fraction form
    2,119.80/3,183.30 = 1,392.60/x
  3. Step 3: Cross multiply
    2,119.80x = 3,183.30 × 1,392.60
  4. Step 4: Simplify right side
    2,119.80x = 4,433,063.58
  5. Step 5: Solve for x
    x = 4,433,063.58/2,119.80
  6. Step 6: Final answer
    x = 2,091.27

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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.