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Finding the Fourth Proportional to 408.12, 612.22 and 119.58

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Solution

The fourth proportional to 408.12, 612.22 and 119.58 is: 179.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.12 : 612.22 = 119.58 : x
  2. Step 2: Convert to fraction form
    408.12/612.22 = 119.58/x
  3. Step 3: Cross multiply
    408.12x = 612.22 × 119.58
  4. Step 4: Simplify right side
    408.12x = 73,209.27
  5. Step 5: Solve for x
    x = 73,209.27/408.12
  6. Step 6: Final answer
    x = 179.38

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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.