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Finding the Fourth Proportional to 249.12, 343.38 and 190.80

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Solution

The fourth proportional to 249.12, 343.38 and 190.80 is: 262.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.12 : 343.38 = 190.80 : x
  2. Step 2: Convert to fraction form
    249.12/343.38 = 190.80/x
  3. Step 3: Cross multiply
    249.12x = 343.38 × 190.80
  4. Step 4: Simplify right side
    249.12x = 65,516.90
  5. Step 5: Solve for x
    x = 65,516.90/249.12
  6. Step 6: Final answer
    x = 262.99

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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.