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Finding the Fourth Proportional to 408.46, 612.42 and 243.94

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Solution

The fourth proportional to 408.46, 612.42 and 243.94 is: 365.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.46 : 612.42 = 243.94 : x
  2. Step 2: Convert to fraction form
    408.46/612.42 = 243.94/x
  3. Step 3: Cross multiply
    408.46x = 612.42 × 243.94
  4. Step 4: Simplify right side
    408.46x = 149,393.73
  5. Step 5: Solve for x
    x = 149,393.73/408.46
  6. Step 6: Final answer
    x = 365.75

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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.