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Finding the Fourth Proportional to 401.08, 601.09 and 205.91

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Solution

The fourth proportional to 401.08, 601.09 and 205.91 is: 308.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.08 : 601.09 = 205.91 : x
  2. Step 2: Convert to fraction form
    401.08/601.09 = 205.91/x
  3. Step 3: Cross multiply
    401.08x = 601.09 × 205.91
  4. Step 4: Simplify right side
    401.08x = 123,770.44
  5. Step 5: Solve for x
    x = 123,770.44/401.08
  6. Step 6: Final answer
    x = 308.59

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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.