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Finding the Fourth Proportional to 322.08, 480.96 and 218.56

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Solution

The fourth proportional to 322.08, 480.96 and 218.56 is: 326.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.08 : 480.96 = 218.56 : x
  2. Step 2: Convert to fraction form
    322.08/480.96 = 218.56/x
  3. Step 3: Cross multiply
    322.08x = 480.96 × 218.56
  4. Step 4: Simplify right side
    322.08x = 105,118.62
  5. Step 5: Solve for x
    x = 105,118.62/322.08
  6. Step 6: Final answer
    x = 326.37

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.