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Finding the Fourth Proportional to 3,879.96, 5,820.86 and 1,106.67

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Solution

The fourth proportional to 3,879.96, 5,820.86 and 1,106.67 is: 1,660.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.96 : 5,820.86 = 1,106.67 : x
  2. Step 2: Convert to fraction form
    3,879.96/5,820.86 = 1,106.67/x
  3. Step 3: Cross multiply
    3,879.96x = 5,820.86 × 1,106.67
  4. Step 4: Simplify right side
    3,879.96x = 6,441,765.60
  5. Step 5: Solve for x
    x = 6,441,765.60/3,879.96
  6. Step 6: Final answer
    x = 1,660.27

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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.