Home / 2,081.22-3,121.75-620.38

Finding the Fourth Proportional to 2,081.22, 3,121.75 and 620.38

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Solution

The fourth proportional to 2,081.22, 3,121.75 and 620.38 is: 930.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,081.22 : 3,121.75 = 620.38 : x
  2. Step 2: Convert to fraction form
    2,081.22/3,121.75 = 620.38/x
  3. Step 3: Cross multiply
    2,081.22x = 3,121.75 × 620.38
  4. Step 4: Simplify right side
    2,081.22x = 1,936,671.27
  5. Step 5: Solve for x
    x = 1,936,671.27/2,081.22
  6. Step 6: Final answer
    x = 930.55

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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.