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Finding the Fourth Proportional to 296.46, 408.78 and 198.18

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Solution

The fourth proportional to 296.46, 408.78 and 198.18 is: 273.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.46 : 408.78 = 198.18 : x
  2. Step 2: Convert to fraction form
    296.46/408.78 = 198.18/x
  3. Step 3: Cross multiply
    296.46x = 408.78 × 198.18
  4. Step 4: Simplify right side
    296.46x = 81,012.02
  5. Step 5: Solve for x
    x = 81,012.02/296.46
  6. Step 6: Final answer
    x = 273.26

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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.