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Finding the Fourth Proportional to 423.08, 634.55 and 163.20

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Solution

The fourth proportional to 423.08, 634.55 and 163.20 is: 244.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.08 : 634.55 = 163.20 : x
  2. Step 2: Convert to fraction form
    423.08/634.55 = 163.20/x
  3. Step 3: Cross multiply
    423.08x = 634.55 × 163.20
  4. Step 4: Simplify right side
    423.08x = 103,560.46
  5. Step 5: Solve for x
    x = 103,560.46/423.08
  6. Step 6: Final answer
    x = 244.78

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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.