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Finding the Fourth Proportional to 2,626.96, 3,940.14 and 871.54

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Solution

The fourth proportional to 2,626.96, 3,940.14 and 871.54 is: 1,307.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,626.96 : 3,940.14 = 871.54 : x
  2. Step 2: Convert to fraction form
    2,626.96/3,940.14 = 871.54/x
  3. Step 3: Cross multiply
    2,626.96x = 3,940.14 × 871.54
  4. Step 4: Simplify right side
    2,626.96x = 3,433,989.62
  5. Step 5: Solve for x
    x = 3,433,989.62/2,626.96
  6. Step 6: Final answer
    x = 1,307.21

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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.