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Finding the Fourth Proportional to 299.12, 447.76 and 217.94

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Solution

The fourth proportional to 299.12, 447.76 and 217.94 is: 326.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.12 : 447.76 = 217.94 : x
  2. Step 2: Convert to fraction form
    299.12/447.76 = 217.94/x
  3. Step 3: Cross multiply
    299.12x = 447.76 × 217.94
  4. Step 4: Simplify right side
    299.12x = 97,584.81
  5. Step 5: Solve for x
    x = 97,584.81/299.12
  6. Step 6: Final answer
    x = 326.24

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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.