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Finding the Fourth Proportional to 198.52, 272.48 and 172.60

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Solution

The fourth proportional to 198.52, 272.48 and 172.60 is: 236.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.52 : 272.48 = 172.60 : x
  2. Step 2: Convert to fraction form
    198.52/272.48 = 172.60/x
  3. Step 3: Cross multiply
    198.52x = 272.48 × 172.60
  4. Step 4: Simplify right side
    198.52x = 47,030.05
  5. Step 5: Solve for x
    x = 47,030.05/198.52
  6. Step 6: Final answer
    x = 236.90

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.