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Finding the Fourth Proportional to 229.36, 315.76 and 198.68

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Solution

The fourth proportional to 229.36, 315.76 and 198.68 is: 273.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.36 : 315.76 = 198.68 : x
  2. Step 2: Convert to fraction form
    229.36/315.76 = 198.68/x
  3. Step 3: Cross multiply
    229.36x = 315.76 × 198.68
  4. Step 4: Simplify right side
    229.36x = 62,735.20
  5. Step 5: Solve for x
    x = 62,735.20/229.36
  6. Step 6: Final answer
    x = 273.52

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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.