Home / 3,289.80-4,942.70-2,120.37

Finding the Fourth Proportional to 3,289.80, 4,942.70 and 2,120.37

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Solution

The fourth proportional to 3,289.80, 4,942.70 and 2,120.37 is: 3,185.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,289.80 : 4,942.70 = 2,120.37 : x
  2. Step 2: Convert to fraction form
    3,289.80/4,942.70 = 2,120.37/x
  3. Step 3: Cross multiply
    3,289.80x = 4,942.70 × 2,120.37
  4. Step 4: Simplify right side
    3,289.80x = 10,480,352.80
  5. Step 5: Solve for x
    x = 10,480,352.80/3,289.80
  6. Step 6: Final answer
    x = 3,185.71

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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.