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Finding the Fourth Proportional to 325.68, 488.67 and 163.38

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Solution

The fourth proportional to 325.68, 488.67 and 163.38 is: 245.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.68 : 488.67 = 163.38 : x
  2. Step 2: Convert to fraction form
    325.68/488.67 = 163.38/x
  3. Step 3: Cross multiply
    325.68x = 488.67 × 163.38
  4. Step 4: Simplify right side
    325.68x = 79,838.90
  5. Step 5: Solve for x
    x = 79,838.90/325.68
  6. Step 6: Final answer
    x = 245.15

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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.