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Finding the Fourth Proportional to 222.90, 330.60 and 219.66

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Solution

The fourth proportional to 222.90, 330.60 and 219.66 is: 325.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.90 : 330.60 = 219.66 : x
  2. Step 2: Convert to fraction form
    222.90/330.60 = 219.66/x
  3. Step 3: Cross multiply
    222.90x = 330.60 × 219.66
  4. Step 4: Simplify right side
    222.90x = 72,619.60
  5. Step 5: Solve for x
    x = 72,619.60/222.90
  6. Step 6: Final answer
    x = 325.79

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.