Home / 2,081.26-3,121.75-620.43

Finding the Fourth Proportional to 2,081.26, 3,121.75 and 620.43

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Solution

The fourth proportional to 2,081.26, 3,121.75 and 620.43 is: 930.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,081.26 : 3,121.75 = 620.43 : x
  2. Step 2: Convert to fraction form
    2,081.26/3,121.75 = 620.43/x
  3. Step 3: Cross multiply
    2,081.26x = 3,121.75 × 620.43
  4. Step 4: Simplify right side
    2,081.26x = 1,936,827.35
  5. Step 5: Solve for x
    x = 1,936,827.35/2,081.26
  6. Step 6: Final answer
    x = 930.60

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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.