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Finding the Fourth Proportional to 3,163.72, 4,747.29 and 1,316.11

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Solution

The fourth proportional to 3,163.72, 4,747.29 and 1,316.11 is: 1,974.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,163.72 : 4,747.29 = 1,316.11 : x
  2. Step 2: Convert to fraction form
    3,163.72/4,747.29 = 1,316.11/x
  3. Step 3: Cross multiply
    3,163.72x = 4,747.29 × 1,316.11
  4. Step 4: Simplify right side
    3,163.72x = 6,247,943.97
  5. Step 5: Solve for x
    x = 6,247,943.97/3,163.72
  6. Step 6: Final answer
    x = 1,974.87

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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.