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Finding the Fourth Proportional to 326.73, 490.21 and 144.26

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Solution

The fourth proportional to 326.73, 490.21 and 144.26 is: 216.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.73 : 490.21 = 144.26 : x
  2. Step 2: Convert to fraction form
    326.73/490.21 = 144.26/x
  3. Step 3: Cross multiply
    326.73x = 490.21 × 144.26
  4. Step 4: Simplify right side
    326.73x = 70,717.69
  5. Step 5: Solve for x
    x = 70,717.69/326.73
  6. Step 6: Final answer
    x = 216.44

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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.