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Finding the Fourth Proportional to 400.81, 601.33 and 154.09

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Solution

The fourth proportional to 400.81, 601.33 and 154.09 is: 231.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.81 : 601.33 = 154.09 : x
  2. Step 2: Convert to fraction form
    400.81/601.33 = 154.09/x
  3. Step 3: Cross multiply
    400.81x = 601.33 × 154.09
  4. Step 4: Simplify right side
    400.81x = 92,658.94
  5. Step 5: Solve for x
    x = 92,658.94/400.81
  6. Step 6: Final answer
    x = 231.18

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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.