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Finding the Fourth Proportional to 219.57, 326.99 and 218.49

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Solution

The fourth proportional to 219.57, 326.99 and 218.49 is: 325.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.57 : 326.99 = 218.49 : x
  2. Step 2: Convert to fraction form
    219.57/326.99 = 218.49/x
  3. Step 3: Cross multiply
    219.57x = 326.99 × 218.49
  4. Step 4: Simplify right side
    219.57x = 71,442.95
  5. Step 5: Solve for x
    x = 71,442.95/219.57
  6. Step 6: Final answer
    x = 325.38

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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.