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Finding the Fourth Proportional to 408.39, 563.72 and 298.43

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Solution

The fourth proportional to 408.39, 563.72 and 298.43 is: 411.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.39 : 563.72 = 298.43 : x
  2. Step 2: Convert to fraction form
    408.39/563.72 = 298.43/x
  3. Step 3: Cross multiply
    408.39x = 563.72 × 298.43
  4. Step 4: Simplify right side
    408.39x = 168,230.96
  5. Step 5: Solve for x
    x = 168,230.96/408.39
  6. Step 6: Final answer
    x = 411.94

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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.