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Finding the Fourth Proportional to 321.14, 480.78 and 244.41

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Solution

The fourth proportional to 321.14, 480.78 and 244.41 is: 365.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.14 : 480.78 = 244.41 : x
  2. Step 2: Convert to fraction form
    321.14/480.78 = 244.41/x
  3. Step 3: Cross multiply
    321.14x = 480.78 × 244.41
  4. Step 4: Simplify right side
    321.14x = 117,507.44
  5. Step 5: Solve for x
    x = 117,507.44/321.14
  6. Step 6: Final answer
    x = 365.91

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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.