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Finding the Fourth Proportional to 163.79, 227.07 and 155.46

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Solution

The fourth proportional to 163.79, 227.07 and 155.46 is: 215.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.79 : 227.07 = 155.46 : x
  2. Step 2: Convert to fraction form
    163.79/227.07 = 155.46/x
  3. Step 3: Cross multiply
    163.79x = 227.07 × 155.46
  4. Step 4: Simplify right side
    163.79x = 35,300.30
  5. Step 5: Solve for x
    x = 35,300.30/163.79
  6. Step 6: Final answer
    x = 215.53

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.