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Finding the Fourth Proportional to 402.38, 603.30 and 219.62

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Solution

The fourth proportional to 402.38, 603.30 and 219.62 is: 329.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.38 : 603.30 = 219.62 : x
  2. Step 2: Convert to fraction form
    402.38/603.30 = 219.62/x
  3. Step 3: Cross multiply
    402.38x = 603.30 × 219.62
  4. Step 4: Simplify right side
    402.38x = 132,496.75
  5. Step 5: Solve for x
    x = 132,496.75/402.38
  6. Step 6: Final answer
    x = 329.28

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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.