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Finding the Fourth Proportional to 328.92, 453.92 and 198

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Solution

The fourth proportional to 328.92, 453.92 and 198 is: 273.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.92 : 453.92 = 198 : x
  2. Step 2: Convert to fraction form
    328.92/453.92 = 198/x
  3. Step 3: Cross multiply
    328.92x = 453.92 × 198
  4. Step 4: Simplify right side
    328.92x = 89,876.16
  5. Step 5: Solve for x
    x = 89,876.16/328.92
  6. Step 6: Final answer
    x = 273.25

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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.