Home / 2,121.48-3,180.60-1,198.08

Finding the Fourth Proportional to 2,121.48, 3,180.60 and 1,198.08

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Solution

The fourth proportional to 2,121.48, 3,180.60 and 1,198.08 is: 1,796.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.48 : 3,180.60 = 1,198.08 : x
  2. Step 2: Convert to fraction form
    2,121.48/3,180.60 = 1,198.08/x
  3. Step 3: Cross multiply
    2,121.48x = 3,180.60 × 1,198.08
  4. Step 4: Simplify right side
    2,121.48x = 3,810,613.25
  5. Step 5: Solve for x
    x = 3,810,613.25/2,121.48
  6. Step 6: Final answer
    x = 1,796.21

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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.