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Finding the Fourth Proportional to 629.91, 943.89 and 321.33

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Solution

The fourth proportional to 629.91, 943.89 and 321.33 is: 481.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.91 : 943.89 = 321.33 : x
  2. Step 2: Convert to fraction form
    629.91/943.89 = 321.33/x
  3. Step 3: Cross multiply
    629.91x = 943.89 × 321.33
  4. Step 4: Simplify right side
    629.91x = 303,300.17
  5. Step 5: Solve for x
    x = 303,300.17/629.91
  6. Step 6: Final answer
    x = 481.50

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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.