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Finding the Fourth Proportional to 401.38, 602.09 and 144.88

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Solution

The fourth proportional to 401.38, 602.09 and 144.88 is: 217.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.38 : 602.09 = 144.88 : x
  2. Step 2: Convert to fraction form
    401.38/602.09 = 144.88/x
  3. Step 3: Cross multiply
    401.38x = 602.09 × 144.88
  4. Step 4: Simplify right side
    401.38x = 87,230.80
  5. Step 5: Solve for x
    x = 87,230.80/401.38
  6. Step 6: Final answer
    x = 217.33

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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.