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Finding the Fourth Proportional to 288.09, 397.57 and 163.75

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Solution

The fourth proportional to 288.09, 397.57 and 163.75 is: 225.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.09 : 397.57 = 163.75 : x
  2. Step 2: Convert to fraction form
    288.09/397.57 = 163.75/x
  3. Step 3: Cross multiply
    288.09x = 397.57 × 163.75
  4. Step 4: Simplify right side
    288.09x = 65,100.68
  5. Step 5: Solve for x
    x = 65,100.68/288.09
  6. Step 6: Final answer
    x = 225.97

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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.