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Finding the Fourth Proportional to 401.55, 601.37 and 218.49

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Solution

The fourth proportional to 401.55, 601.37 and 218.49 is: 327.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.55 : 601.37 = 218.49 : x
  2. Step 2: Convert to fraction form
    401.55/601.37 = 218.49/x
  3. Step 3: Cross multiply
    401.55x = 601.37 × 218.49
  4. Step 4: Simplify right side
    401.55x = 131,392.24
  5. Step 5: Solve for x
    x = 131,392.24/401.55
  6. Step 6: Final answer
    x = 327.21

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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.