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Finding the Fourth Proportional to 400.71, 601.28 and 218.11

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Solution

The fourth proportional to 400.71, 601.28 and 218.11 is: 327.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.71 : 601.28 = 218.11 : x
  2. Step 2: Convert to fraction form
    400.71/601.28 = 218.11/x
  3. Step 3: Cross multiply
    400.71x = 601.28 × 218.11
  4. Step 4: Simplify right side
    400.71x = 131,146.68
  5. Step 5: Solve for x
    x = 131,146.68/400.71
  6. Step 6: Final answer
    x = 327.29

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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.