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Finding the Fourth Proportional to 279.01, 417.96 and 221.33

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Solution

The fourth proportional to 279.01, 417.96 and 221.33 is: 331.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.01 : 417.96 = 221.33 : x
  2. Step 2: Convert to fraction form
    279.01/417.96 = 221.33/x
  3. Step 3: Cross multiply
    279.01x = 417.96 × 221.33
  4. Step 4: Simplify right side
    279.01x = 92,508.13
  5. Step 5: Solve for x
    x = 92,508.13/279.01
  6. Step 6: Final answer
    x = 331.56

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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.