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Finding the Fourth Proportional to 3,800.61, 5,243.61 and 2,121.75

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Solution

The fourth proportional to 3,800.61, 5,243.61 and 2,121.75 is: 2,927.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,800.61 : 5,243.61 = 2,121.75 : x
  2. Step 2: Convert to fraction form
    3,800.61/5,243.61 = 2,121.75/x
  3. Step 3: Cross multiply
    3,800.61x = 5,243.61 × 2,121.75
  4. Step 4: Simplify right side
    3,800.61x = 11,125,629.52
  5. Step 5: Solve for x
    x = 11,125,629.52/3,800.61
  6. Step 6: Final answer
    x = 2,927.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.