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Finding the Fourth Proportional to 163.44, 243.45 and 157.62

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Solution

The fourth proportional to 163.44, 243.45 and 157.62 is: 234.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.44 : 243.45 = 157.62 : x
  2. Step 2: Convert to fraction form
    163.44/243.45 = 157.62/x
  3. Step 3: Cross multiply
    163.44x = 243.45 × 157.62
  4. Step 4: Simplify right side
    163.44x = 38,372.59
  5. Step 5: Solve for x
    x = 38,372.59/163.44
  6. Step 6: Final answer
    x = 234.78

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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.