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Finding the Fourth Proportional to 843.49, 1,163.81 and 511.91

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Solution

The fourth proportional to 843.49, 1,163.81 and 511.91 is: 706.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.49 : 1,163.81 = 511.91 : x
  2. Step 2: Convert to fraction form
    843.49/1,163.81 = 511.91/x
  3. Step 3: Cross multiply
    843.49x = 1,163.81 × 511.91
  4. Step 4: Simplify right side
    843.49x = 595,765.80
  5. Step 5: Solve for x
    x = 595,765.80/843.49
  6. Step 6: Final answer
    x = 706.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.