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Finding the Fourth Proportional to 326.75, 490.12 and 235.49

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Solution

The fourth proportional to 326.75, 490.12 and 235.49 is: 353.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.75 : 490.12 = 235.49 : x
  2. Step 2: Convert to fraction form
    326.75/490.12 = 235.49/x
  3. Step 3: Cross multiply
    326.75x = 490.12 × 235.49
  4. Step 4: Simplify right side
    326.75x = 115,415.32
  5. Step 5: Solve for x
    x = 115,415.32/326.75
  6. Step 6: Final answer
    x = 353.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.