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Finding the Fourth Proportional to 163.62, 243.98 and 155.39

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Solution

The fourth proportional to 163.62, 243.98 and 155.39 is: 231.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.62 : 243.98 = 155.39 : x
  2. Step 2: Convert to fraction form
    163.62/243.98 = 155.39/x
  3. Step 3: Cross multiply
    163.62x = 243.98 × 155.39
  4. Step 4: Simplify right side
    163.62x = 37,910.06
  5. Step 5: Solve for x
    x = 37,910.06/163.62
  6. Step 6: Final answer
    x = 231.70

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.