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Finding the Fourth Proportional to 248.91, 343.49 and 144

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Solution

The fourth proportional to 248.91, 343.49 and 144 is: 198.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.91 : 343.49 = 144 : x
  2. Step 2: Convert to fraction form
    248.91/343.49 = 144/x
  3. Step 3: Cross multiply
    248.91x = 343.49 × 144
  4. Step 4: Simplify right side
    248.91x = 49,462.56
  5. Step 5: Solve for x
    x = 49,462.56/248.91
  6. Step 6: Final answer
    x = 198.72

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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.