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Finding the Fourth Proportional to 327.57, 490.23 and 258.51

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Solution

The fourth proportional to 327.57, 490.23 and 258.51 is: 386.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.57 : 490.23 = 258.51 : x
  2. Step 2: Convert to fraction form
    327.57/490.23 = 258.51/x
  3. Step 3: Cross multiply
    327.57x = 490.23 × 258.51
  4. Step 4: Simplify right side
    327.57x = 126,729.36
  5. Step 5: Solve for x
    x = 126,729.36/327.57
  6. Step 6: Final answer
    x = 386.88

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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.