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Finding the Fourth Proportional to 3,942.78, 5,914.17 and 1,604.06

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Solution

The fourth proportional to 3,942.78, 5,914.17 and 1,604.06 is: 2,406.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,942.78 : 5,914.17 = 1,604.06 : x
  2. Step 2: Convert to fraction form
    3,942.78/5,914.17 = 1,604.06/x
  3. Step 3: Cross multiply
    3,942.78x = 5,914.17 × 1,604.06
  4. Step 4: Simplify right side
    3,942.78x = 9,486,683.53
  5. Step 5: Solve for x
    x = 9,486,683.53/3,942.78
  6. Step 6: Final answer
    x = 2,406.09

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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.