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Finding the Fourth Proportional to 249.92, 344.91 and 139.44

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Solution

The fourth proportional to 249.92, 344.91 and 139.44 is: 192.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.92 : 344.91 = 139.44 : x
  2. Step 2: Convert to fraction form
    249.92/344.91 = 139.44/x
  3. Step 3: Cross multiply
    249.92x = 344.91 × 139.44
  4. Step 4: Simplify right side
    249.92x = 48,094.25
  5. Step 5: Solve for x
    x = 48,094.25/249.92
  6. Step 6: Final answer
    x = 192.44

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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.