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Finding the Fourth Proportional to 3,879.62, 5,817.73 and 1,105.67

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Solution

The fourth proportional to 3,879.62, 5,817.73 and 1,105.67 is: 1,658.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.62 : 5,817.73 = 1,105.67 : x
  2. Step 2: Convert to fraction form
    3,879.62/5,817.73 = 1,105.67/x
  3. Step 3: Cross multiply
    3,879.62x = 5,817.73 × 1,105.67
  4. Step 4: Simplify right side
    3,879.62x = 6,432,457.68
  5. Step 5: Solve for x
    x = 6,432,457.68/3,879.62
  6. Step 6: Final answer
    x = 1,658.01

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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.