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Finding the Fourth Proportional to 249.89, 344.86 and 139.37

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Solution

The fourth proportional to 249.89, 344.86 and 139.37 is: 192.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.89 : 344.86 = 139.37 : x
  2. Step 2: Convert to fraction form
    249.89/344.86 = 139.37/x
  3. Step 3: Cross multiply
    249.89x = 344.86 × 139.37
  4. Step 4: Simplify right side
    249.89x = 48,063.14
  5. Step 5: Solve for x
    x = 48,063.14/249.89
  6. Step 6: Final answer
    x = 192.34

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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.