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Finding the Fourth Proportional to 249.81, 344.75 and 197.22

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Solution

The fourth proportional to 249.81, 344.75 and 197.22 is: 272.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.81 : 344.75 = 197.22 : x
  2. Step 2: Convert to fraction form
    249.81/344.75 = 197.22/x
  3. Step 3: Cross multiply
    249.81x = 344.75 × 197.22
  4. Step 4: Simplify right side
    249.81x = 67,991.60
  5. Step 5: Solve for x
    x = 67,991.60/249.81
  6. Step 6: Final answer
    x = 272.17

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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.