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Finding the Fourth Proportional to 5,479.68, 8,205.48 and 3,811.44

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Solution

The fourth proportional to 5,479.68, 8,205.48 and 3,811.44 is: 5,707.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,479.68 : 8,205.48 = 3,811.44 : x
  2. Step 2: Convert to fraction form
    5,479.68/8,205.48 = 3,811.44/x
  3. Step 3: Cross multiply
    5,479.68x = 8,205.48 × 3,811.44
  4. Step 4: Simplify right side
    5,479.68x = 31,274,694.69
  5. Step 5: Solve for x
    x = 31,274,694.69/5,479.68
  6. Step 6: Final answer
    x = 5,707.39

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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.