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Finding the Fourth Proportional to 163.20, 243.60 and 153.84

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Solution

The fourth proportional to 163.20, 243.60 and 153.84 is: 229.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.20 : 243.60 = 153.84 : x
  2. Step 2: Convert to fraction form
    163.20/243.60 = 153.84/x
  3. Step 3: Cross multiply
    163.20x = 243.60 × 153.84
  4. Step 4: Simplify right side
    163.20x = 37,475.42
  5. Step 5: Solve for x
    x = 37,475.42/163.20
  6. Step 6: Final answer
    x = 229.63

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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.