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Finding the Fourth Proportional to 480.73, 721.33 and 318.37

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Solution

The fourth proportional to 480.73, 721.33 and 318.37 is: 477.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.73 : 721.33 = 318.37 : x
  2. Step 2: Convert to fraction form
    480.73/721.33 = 318.37/x
  3. Step 3: Cross multiply
    480.73x = 721.33 × 318.37
  4. Step 4: Simplify right side
    480.73x = 229,646.23
  5. Step 5: Solve for x
    x = 229,646.23/480.73
  6. Step 6: Final answer
    x = 477.71

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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.