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Finding the Fourth Proportional to 327.38, 490.05 and 290.79

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Solution

The fourth proportional to 327.38, 490.05 and 290.79 is: 435.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.38 : 490.05 = 290.79 : x
  2. Step 2: Convert to fraction form
    327.38/490.05 = 290.79/x
  3. Step 3: Cross multiply
    327.38x = 490.05 × 290.79
  4. Step 4: Simplify right side
    327.38x = 142,501.64
  5. Step 5: Solve for x
    x = 142,501.64/327.38
  6. Step 6: Final answer
    x = 435.29

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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.