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Finding the Fourth Proportional to 163.15, 243.27 and 149.33

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Solution

The fourth proportional to 163.15, 243.27 and 149.33 is: 222.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.15 : 243.27 = 149.33 : x
  2. Step 2: Convert to fraction form
    163.15/243.27 = 149.33/x
  3. Step 3: Cross multiply
    163.15x = 243.27 × 149.33
  4. Step 4: Simplify right side
    163.15x = 36,327.15
  5. Step 5: Solve for x
    x = 36,327.15/163.15
  6. Step 6: Final answer
    x = 222.66

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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.