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Finding the Fourth Proportional to 326.56, 490.00 and 153.24

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Solution

The fourth proportional to 326.56, 490.00 and 153.24 is: 229.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.56 : 490.00 = 153.24 : x
  2. Step 2: Convert to fraction form
    326.56/490.00 = 153.24/x
  3. Step 3: Cross multiply
    326.56x = 490.00 × 153.24
  4. Step 4: Simplify right side
    326.56x = 75,086.64
  5. Step 5: Solve for x
    x = 75,086.64/326.56
  6. Step 6: Final answer
    x = 229.93

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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.