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Finding the Fourth Proportional to 192.85, 288.96 and 131.02

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Solution

The fourth proportional to 192.85, 288.96 and 131.02 is: 196.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.85 : 288.96 = 131.02 : x
  2. Step 2: Convert to fraction form
    192.85/288.96 = 131.02/x
  3. Step 3: Cross multiply
    192.85x = 288.96 × 131.02
  4. Step 4: Simplify right side
    192.85x = 37,859.54
  5. Step 5: Solve for x
    x = 37,859.54/192.85
  6. Step 6: Final answer
    x = 196.32

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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.