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Finding the Fourth Proportional to 326, 488.58 and 163.76

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Solution

The fourth proportional to 326, 488.58 and 163.76 is: 245.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    326 : 488.58 = 163.76 : x
  2. Step 2: Convert to fraction form
    326/488.58 = 163.76/x
  3. Step 3: Cross multiply
    326x = 488.58 × 163.76
  4. Step 4: Simplify right side
    326x = 80,009.86
  5. Step 5: Solve for x
    x = 80,009.86/326
  6. Step 6: Final answer
    x = 245.43

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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.