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Finding the Fourth Proportional to 197.36, 272.31 and 113.33

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Solution

The fourth proportional to 197.36, 272.31 and 113.33 is: 156.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.36 : 272.31 = 113.33 : x
  2. Step 2: Convert to fraction form
    197.36/272.31 = 113.33/x
  3. Step 3: Cross multiply
    197.36x = 272.31 × 113.33
  4. Step 4: Simplify right side
    197.36x = 30,860.89
  5. Step 5: Solve for x
    x = 30,860.89/197.36
  6. Step 6: Final answer
    x = 156.37

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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.