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Finding the Fourth Proportional to 298.38, 411.90 and 205.32

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Solution

The fourth proportional to 298.38, 411.90 and 205.32 is: 283.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.38 : 411.90 = 205.32 : x
  2. Step 2: Convert to fraction form
    298.38/411.90 = 205.32/x
  3. Step 3: Cross multiply
    298.38x = 411.90 × 205.32
  4. Step 4: Simplify right side
    298.38x = 84,571.31
  5. Step 5: Solve for x
    x = 84,571.31/298.38
  6. Step 6: Final answer
    x = 283.43

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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.