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Finding the Fourth Proportional to 2,100.27, 3,150.41 and 620.54

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Solution

The fourth proportional to 2,100.27, 3,150.41 and 620.54 is: 930.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,100.27 : 3,150.41 = 620.54 : x
  2. Step 2: Convert to fraction form
    2,100.27/3,150.41 = 620.54/x
  3. Step 3: Cross multiply
    2,100.27x = 3,150.41 × 620.54
  4. Step 4: Simplify right side
    2,100.27x = 1,954,937.73
  5. Step 5: Solve for x
    x = 1,954,937.73/2,100.27
  6. Step 6: Final answer
    x = 930.80

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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.