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Finding the Fourth Proportional to 490.68, 736.20 and 326.81

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Solution

The fourth proportional to 490.68, 736.20 and 326.81 is: 490.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.68 : 736.20 = 326.81 : x
  2. Step 2: Convert to fraction form
    490.68/736.20 = 326.81/x
  3. Step 3: Cross multiply
    490.68x = 736.20 × 326.81
  4. Step 4: Simplify right side
    490.68x = 240,597.52
  5. Step 5: Solve for x
    x = 240,597.52/490.68
  6. Step 6: Final answer
    x = 490.33

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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.