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Finding the Fourth Proportional to 286.01, 395.09 and 221.34

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Solution

The fourth proportional to 286.01, 395.09 and 221.34 is: 305.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.01 : 395.09 = 221.34 : x
  2. Step 2: Convert to fraction form
    286.01/395.09 = 221.34/x
  3. Step 3: Cross multiply
    286.01x = 395.09 × 221.34
  4. Step 4: Simplify right side
    286.01x = 87,449.22
  5. Step 5: Solve for x
    x = 87,449.22/286.01
  6. Step 6: Final answer
    x = 305.76

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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.