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Finding the Fourth Proportional to 229.16, 315.79 and 163.55

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Solution

The fourth proportional to 229.16, 315.79 and 163.55 is: 225.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.16 : 315.79 = 163.55 : x
  2. Step 2: Convert to fraction form
    229.16/315.79 = 163.55/x
  3. Step 3: Cross multiply
    229.16x = 315.79 × 163.55
  4. Step 4: Simplify right side
    229.16x = 51,647.45
  5. Step 5: Solve for x
    x = 51,647.45/229.16
  6. Step 6: Final answer
    x = 225.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.