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Finding the Fourth Proportional to 215.47, 322.92 and 163.96

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Solution

The fourth proportional to 215.47, 322.92 and 163.96 is: 245.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.47 : 322.92 = 163.96 : x
  2. Step 2: Convert to fraction form
    215.47/322.92 = 163.96/x
  3. Step 3: Cross multiply
    215.47x = 322.92 × 163.96
  4. Step 4: Simplify right side
    215.47x = 52,945.96
  5. Step 5: Solve for x
    x = 52,945.96/215.47
  6. Step 6: Final answer
    x = 245.72

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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.