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Finding the Fourth Proportional to 249.36, 343.98 and 151.09

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Solution

The fourth proportional to 249.36, 343.98 and 151.09 is: 208.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.36 : 343.98 = 151.09 : x
  2. Step 2: Convert to fraction form
    249.36/343.98 = 151.09/x
  3. Step 3: Cross multiply
    249.36x = 343.98 × 151.09
  4. Step 4: Simplify right side
    249.36x = 51,973.01
  5. Step 5: Solve for x
    x = 51,973.01/249.36
  6. Step 6: Final answer
    x = 208.43

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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.