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Finding the Fourth Proportional to 3,471.86, 5,205.49 and 1,912.61

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Solution

The fourth proportional to 3,471.86, 5,205.49 and 1,912.61 is: 2,867.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,471.86 : 5,205.49 = 1,912.61 : x
  2. Step 2: Convert to fraction form
    3,471.86/5,205.49 = 1,912.61/x
  3. Step 3: Cross multiply
    3,471.86x = 5,205.49 × 1,912.61
  4. Step 4: Simplify right side
    3,471.86x = 9,956,085.84
  5. Step 5: Solve for x
    x = 9,956,085.84/3,471.86
  6. Step 6: Final answer
    x = 2,867.65

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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.