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Finding the Fourth Proportional to 630.22, 944.31 and 321.65

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Solution

The fourth proportional to 630.22, 944.31 and 321.65 is: 481.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.22 : 944.31 = 321.65 : x
  2. Step 2: Convert to fraction form
    630.22/944.31 = 321.65/x
  3. Step 3: Cross multiply
    630.22x = 944.31 × 321.65
  4. Step 4: Simplify right side
    630.22x = 303,737.31
  5. Step 5: Solve for x
    x = 303,737.31/630.22
  6. Step 6: Final answer
    x = 481.95

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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.