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Finding the Fourth Proportional to 843.18, 1,163.37 and 548.40

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Solution

The fourth proportional to 843.18, 1,163.37 and 548.40 is: 756.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.18 : 1,163.37 = 548.40 : x
  2. Step 2: Convert to fraction form
    843.18/1,163.37 = 548.40/x
  3. Step 3: Cross multiply
    843.18x = 1,163.37 × 548.40
  4. Step 4: Simplify right side
    843.18x = 637,992.11
  5. Step 5: Solve for x
    x = 637,992.11/843.18
  6. Step 6: Final answer
    x = 756.65

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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.