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Finding the Fourth Proportional to 3,853.96, 5,781.46 and 1,879.68

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Solution

The fourth proportional to 3,853.96, 5,781.46 and 1,879.68 is: 2,819.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,853.96 : 5,781.46 = 1,879.68 : x
  2. Step 2: Convert to fraction form
    3,853.96/5,781.46 = 1,879.68/x
  3. Step 3: Cross multiply
    3,853.96x = 5,781.46 × 1,879.68
  4. Step 4: Simplify right side
    3,853.96x = 10,867,294.73
  5. Step 5: Solve for x
    x = 10,867,294.73/3,853.96
  6. Step 6: Final answer
    x = 2,819.77

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1.5x scale

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.