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Finding the Fourth Proportional to 198.16, 272.85 and 168.60

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Solution

The fourth proportional to 198.16, 272.85 and 168.60 is: 232.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.16 : 272.85 = 168.60 : x
  2. Step 2: Convert to fraction form
    198.16/272.85 = 168.60/x
  3. Step 3: Cross multiply
    198.16x = 272.85 × 168.60
  4. Step 4: Simplify right side
    198.16x = 46,002.51
  5. Step 5: Solve for x
    x = 46,002.51/198.16
  6. Step 6: Final answer
    x = 232.15

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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.