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Finding the Fourth Proportional to 197.29, 272.51 and 139.33

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Solution

The fourth proportional to 197.29, 272.51 and 139.33 is: 192.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.29 : 272.51 = 139.33 : x
  2. Step 2: Convert to fraction form
    197.29/272.51 = 139.33/x
  3. Step 3: Cross multiply
    197.29x = 272.51 × 139.33
  4. Step 4: Simplify right side
    197.29x = 37,968.82
  5. Step 5: Solve for x
    x = 37,968.82/197.29
  6. Step 6: Final answer
    x = 192.45

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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.