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Finding the Fourth Proportional to 844.10, 1,163.81 and 645.18

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Solution

The fourth proportional to 844.10, 1,163.81 and 645.18 is: 889.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.10 : 1,163.81 = 645.18 : x
  2. Step 2: Convert to fraction form
    844.10/1,163.81 = 645.18/x
  3. Step 3: Cross multiply
    844.10x = 1,163.81 × 645.18
  4. Step 4: Simplify right side
    844.10x = 750,868.92
  5. Step 5: Solve for x
    x = 750,868.92/844.10
  6. Step 6: Final answer
    x = 889.55

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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.