Home / 1,990.20-2,745.78-1,203.96

Finding the Fourth Proportional to 1,990.20, 2,745.78 and 1,203.96

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Solution

The fourth proportional to 1,990.20, 2,745.78 and 1,203.96 is: 1,661.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.20 : 2,745.78 = 1,203.96 : x
  2. Step 2: Convert to fraction form
    1,990.20/2,745.78 = 1,203.96/x
  3. Step 3: Cross multiply
    1,990.20x = 2,745.78 × 1,203.96
  4. Step 4: Simplify right side
    1,990.20x = 3,305,809.29
  5. Step 5: Solve for x
    x = 3,305,809.29/1,990.20
  6. Step 6: Final answer
    x = 1,661.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.