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Finding the Fourth Proportional to 285.28, 427.92 and 163.46

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Solution

The fourth proportional to 285.28, 427.92 and 163.46 is: 245.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.28 : 427.92 = 163.46 : x
  2. Step 2: Convert to fraction form
    285.28/427.92 = 163.46/x
  3. Step 3: Cross multiply
    285.28x = 427.92 × 163.46
  4. Step 4: Simplify right side
    285.28x = 69,945.66
  5. Step 5: Solve for x
    x = 69,945.66/285.28
  6. Step 6: Final answer
    x = 245.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.