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Finding the Fourth Proportional to 3,879.68, 5,360.24 and 2,705.99

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Solution

The fourth proportional to 3,879.68, 5,360.24 and 2,705.99 is: 3,738.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.68 : 5,360.24 = 2,705.99 : x
  2. Step 2: Convert to fraction form
    3,879.68/5,360.24 = 2,705.99/x
  3. Step 3: Cross multiply
    3,879.68x = 5,360.24 × 2,705.99
  4. Step 4: Simplify right side
    3,879.68x = 14,504,755.71
  5. Step 5: Solve for x
    x = 14,504,755.71/3,879.68
  6. Step 6: Final answer
    x = 3,738.65

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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.