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Finding the Fourth Proportional to 299.20, 412.91 and 168.22

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Solution

The fourth proportional to 299.20, 412.91 and 168.22 is: 232.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.20 : 412.91 = 168.22 : x
  2. Step 2: Convert to fraction form
    299.20/412.91 = 168.22/x
  3. Step 3: Cross multiply
    299.20x = 412.91 × 168.22
  4. Step 4: Simplify right side
    299.20x = 69,459.72
  5. Step 5: Solve for x
    x = 69,459.72/299.20
  6. Step 6: Final answer
    x = 232.15

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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.