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Finding the Fourth Proportional to 299.22, 412.92 and 211.74

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Solution

The fourth proportional to 299.22, 412.92 and 211.74 is: 292.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.22 : 412.92 = 211.74 : x
  2. Step 2: Convert to fraction form
    299.22/412.92 = 211.74/x
  3. Step 3: Cross multiply
    299.22x = 412.92 × 211.74
  4. Step 4: Simplify right side
    299.22x = 87,431.68
  5. Step 5: Solve for x
    x = 87,431.68/299.22
  6. Step 6: Final answer
    x = 292.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.