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Finding the Fourth Proportional to 408.66, 612.99 and 227.22

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Solution

The fourth proportional to 408.66, 612.99 and 227.22 is: 340.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.66 : 612.99 = 227.22 : x
  2. Step 2: Convert to fraction form
    408.66/612.99 = 227.22/x
  3. Step 3: Cross multiply
    408.66x = 612.99 × 227.22
  4. Step 4: Simplify right side
    408.66x = 139,283.59
  5. Step 5: Solve for x
    x = 139,283.59/408.66
  6. Step 6: Final answer
    x = 340.83

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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.