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Finding the Fourth Proportional to 192.05, 287.97 and 131.25

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Solution

The fourth proportional to 192.05, 287.97 and 131.25 is: 196.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.05 : 287.97 = 131.25 : x
  2. Step 2: Convert to fraction form
    192.05/287.97 = 131.25/x
  3. Step 3: Cross multiply
    192.05x = 287.97 × 131.25
  4. Step 4: Simplify right side
    192.05x = 37,796.06
  5. Step 5: Solve for x
    x = 37,796.06/192.05
  6. Step 6: Final answer
    x = 196.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.