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Finding the Fourth Proportional to 3,404, 5,105.60 and 939.04

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Solution

The fourth proportional to 3,404, 5,105.60 and 939.04 is: 1,408.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,404 : 5,105.60 = 939.04 : x
  2. Step 2: Convert to fraction form
    3,404/5,105.60 = 939.04/x
  3. Step 3: Cross multiply
    3,404x = 5,105.60 × 939.04
  4. Step 4: Simplify right side
    3,404x = 4,794,362.62
  5. Step 5: Solve for x
    x = 4,794,362.62/3,404
  6. Step 6: Final answer
    x = 1,408.45

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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.