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Finding the Fourth Proportional to 215.48, 322.79 and 161.43

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Solution

The fourth proportional to 215.48, 322.79 and 161.43 is: 241.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.48 : 322.79 = 161.43 : x
  2. Step 2: Convert to fraction form
    215.48/322.79 = 161.43/x
  3. Step 3: Cross multiply
    215.48x = 322.79 × 161.43
  4. Step 4: Simplify right side
    215.48x = 52,107.18
  5. Step 5: Solve for x
    x = 52,107.18/215.48
  6. Step 6: Final answer
    x = 241.82

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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.