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Finding the Fourth Proportional to 222.71, 332.20 and 217.85

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Solution

The fourth proportional to 222.71, 332.20 and 217.85 is: 324.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.71 : 332.20 = 217.85 : x
  2. Step 2: Convert to fraction form
    222.71/332.20 = 217.85/x
  3. Step 3: Cross multiply
    222.71x = 332.20 × 217.85
  4. Step 4: Simplify right side
    222.71x = 72,368.68
  5. Step 5: Solve for x
    x = 72,368.68/222.71
  6. Step 6: Final answer
    x = 324.95

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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.