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Finding the Fourth Proportional to 355.44, 490.71 and 249.26

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Solution

The fourth proportional to 355.44, 490.71 and 249.26 is: 344.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.44 : 490.71 = 249.26 : x
  2. Step 2: Convert to fraction form
    355.44/490.71 = 249.26/x
  3. Step 3: Cross multiply
    355.44x = 490.71 × 249.26
  4. Step 4: Simplify right side
    355.44x = 122,316.28
  5. Step 5: Solve for x
    x = 122,316.28/355.44
  6. Step 6: Final answer
    x = 344.12

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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.