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Finding the Fourth Proportional to 3,942.67, 5,914.05 and 1,864.30

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Solution

The fourth proportional to 3,942.67, 5,914.05 and 1,864.30 is: 2,796.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,942.67 : 5,914.05 = 1,864.30 : x
  2. Step 2: Convert to fraction form
    3,942.67/5,914.05 = 1,864.30/x
  3. Step 3: Cross multiply
    3,942.67x = 5,914.05 × 1,864.30
  4. Step 4: Simplify right side
    3,942.67x = 11,025,563.42
  5. Step 5: Solve for x
    x = 11,025,563.42/3,942.67
  6. Step 6: Final answer
    x = 2,796.47

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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.