Home / 2,149.60-3,218.61-1,121.44

Finding the Fourth Proportional to 2,149.60, 3,218.61 and 1,121.44

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Solution

The fourth proportional to 2,149.60, 3,218.61 and 1,121.44 is: 1,679.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,149.60 : 3,218.61 = 1,121.44 : x
  2. Step 2: Convert to fraction form
    2,149.60/3,218.61 = 1,121.44/x
  3. Step 3: Cross multiply
    2,149.60x = 3,218.61 × 1,121.44
  4. Step 4: Simplify right side
    2,149.60x = 3,609,478.00
  5. Step 5: Solve for x
    x = 3,609,478.00/2,149.60
  6. Step 6: Final answer
    x = 1,679.14

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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.