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Finding the Fourth Proportional to 3,940.72, 5,911.08 and 1,019.04

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Solution

The fourth proportional to 3,940.72, 5,911.08 and 1,019.04 is: 1,528.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.72 : 5,911.08 = 1,019.04 : x
  2. Step 2: Convert to fraction form
    3,940.72/5,911.08 = 1,019.04/x
  3. Step 3: Cross multiply
    3,940.72x = 5,911.08 × 1,019.04
  4. Step 4: Simplify right side
    3,940.72x = 6,023,626.96
  5. Step 5: Solve for x
    x = 6,023,626.96/3,940.72
  6. Step 6: Final answer
    x = 1,528.56

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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.