Home / 2,121.44-3,177.91-1,081.40

Finding the Fourth Proportional to 2,121.44, 3,177.91 and 1,081.40

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Solution

The fourth proportional to 2,121.44, 3,177.91 and 1,081.40 is: 1,619.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.44 : 3,177.91 = 1,081.40 : x
  2. Step 2: Convert to fraction form
    2,121.44/3,177.91 = 1,081.40/x
  3. Step 3: Cross multiply
    2,121.44x = 3,177.91 × 1,081.40
  4. Step 4: Simplify right side
    2,121.44x = 3,436,591.87
  5. Step 5: Solve for x
    x = 3,436,591.87/2,121.44
  6. Step 6: Final answer
    x = 1,619.93

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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.