Home / 2,081.08-3,121.76-620.38

Finding the Fourth Proportional to 2,081.08, 3,121.76 and 620.38

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Solution

The fourth proportional to 2,081.08, 3,121.76 and 620.38 is: 930.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,081.08 : 3,121.76 = 620.38 : x
  2. Step 2: Convert to fraction form
    2,081.08/3,121.76 = 620.38/x
  3. Step 3: Cross multiply
    2,081.08x = 3,121.76 × 620.38
  4. Step 4: Simplify right side
    2,081.08x = 1,936,677.47
  5. Step 5: Solve for x
    x = 1,936,677.47/2,081.08
  6. Step 6: Final answer
    x = 930.61

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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.