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Finding the Fourth Proportional to 629.96, 945.09 and 219.11

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Solution

The fourth proportional to 629.96, 945.09 and 219.11 is: 328.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.96 : 945.09 = 219.11 : x
  2. Step 2: Convert to fraction form
    629.96/945.09 = 219.11/x
  3. Step 3: Cross multiply
    629.96x = 945.09 × 219.11
  4. Step 4: Simplify right side
    629.96x = 207,073.94
  5. Step 5: Solve for x
    x = 207,073.94/629.96
  6. Step 6: Final answer
    x = 328.71

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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.