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Finding the Fourth Proportional to 2,080.92, 3,121.49 and 620.09

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Solution

The fourth proportional to 2,080.92, 3,121.49 and 620.09 is: 930.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,080.92 : 3,121.49 = 620.09 : x
  2. Step 2: Convert to fraction form
    2,080.92/3,121.49 = 620.09/x
  3. Step 3: Cross multiply
    2,080.92x = 3,121.49 × 620.09
  4. Step 4: Simplify right side
    2,080.92x = 1,935,586.03
  5. Step 5: Solve for x
    x = 1,935,586.03/2,080.92
  6. Step 6: Final answer
    x = 930.16

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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.