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Finding the Fourth Proportional to 326.86, 490.52 and 153.53

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Solution

The fourth proportional to 326.86, 490.52 and 153.53 is: 230.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.86 : 490.52 = 153.53 : x
  2. Step 2: Convert to fraction form
    326.86/490.52 = 153.53/x
  3. Step 3: Cross multiply
    326.86x = 490.52 × 153.53
  4. Step 4: Simplify right side
    326.86x = 75,311.05
  5. Step 5: Solve for x
    x = 75,311.05/326.86
  6. Step 6: Final answer
    x = 230.41

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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.