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Finding the Fourth Proportional to 438.69, 658.05 and 222.19

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Solution

The fourth proportional to 438.69, 658.05 and 222.19 is: 333.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.69 : 658.05 = 222.19 : x
  2. Step 2: Convert to fraction form
    438.69/658.05 = 222.19/x
  3. Step 3: Cross multiply
    438.69x = 658.05 × 222.19
  4. Step 4: Simplify right side
    438.69x = 146,212.13
  5. Step 5: Solve for x
    x = 146,212.13/438.69
  6. Step 6: Final answer
    x = 333.29

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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.