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Finding the Fourth Proportional to 844.23, 1,163.98 and 645.31

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Solution

The fourth proportional to 844.23, 1,163.98 and 645.31 is: 889.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.23 : 1,163.98 = 645.31 : x
  2. Step 2: Convert to fraction form
    844.23/1,163.98 = 645.31/x
  3. Step 3: Cross multiply
    844.23x = 1,163.98 × 645.31
  4. Step 4: Simplify right side
    844.23x = 751,126.64
  5. Step 5: Solve for x
    x = 751,126.64/844.23
  6. Step 6: Final answer
    x = 889.72

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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.