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Finding the Fourth Proportional to 198.24, 296.04 and 172.62

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Solution

The fourth proportional to 198.24, 296.04 and 172.62 is: 257.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.24 : 296.04 = 172.62 : x
  2. Step 2: Convert to fraction form
    198.24/296.04 = 172.62/x
  3. Step 3: Cross multiply
    198.24x = 296.04 × 172.62
  4. Step 4: Simplify right side
    198.24x = 51,102.42
  5. Step 5: Solve for x
    x = 51,102.42/198.24
  6. Step 6: Final answer
    x = 257.78

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.