Home / 2,198.36-3,281.85-2,121.45

Finding the Fourth Proportional to 2,198.36, 3,281.85 and 2,121.45

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Solution

The fourth proportional to 2,198.36, 3,281.85 and 2,121.45 is: 3,167.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,198.36 : 3,281.85 = 2,121.45 : x
  2. Step 2: Convert to fraction form
    2,198.36/3,281.85 = 2,121.45/x
  3. Step 3: Cross multiply
    2,198.36x = 3,281.85 × 2,121.45
  4. Step 4: Simplify right side
    2,198.36x = 6,962,280.68
  5. Step 5: Solve for x
    x = 6,962,280.68/2,198.36
  6. Step 6: Final answer
    x = 3,167.04

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.