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Finding the Fourth Proportional to 3,879.71, 5,350.69 and 2,620.43

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Solution

The fourth proportional to 3,879.71, 5,350.69 and 2,620.43 is: 3,613.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.71 : 5,350.69 = 2,620.43 : x
  2. Step 2: Convert to fraction form
    3,879.71/5,350.69 = 2,620.43/x
  3. Step 3: Cross multiply
    3,879.71x = 5,350.69 × 2,620.43
  4. Step 4: Simplify right side
    3,879.71x = 14,021,108.60
  5. Step 5: Solve for x
    x = 14,021,108.60/3,879.71
  6. Step 6: Final answer
    x = 3,613.96

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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.