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Finding the Fourth Proportional to 218.54, 327.51 and 154.28

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Solution

The fourth proportional to 218.54, 327.51 and 154.28 is: 231.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.54 : 327.51 = 154.28 : x
  2. Step 2: Convert to fraction form
    218.54/327.51 = 154.28/x
  3. Step 3: Cross multiply
    218.54x = 327.51 × 154.28
  4. Step 4: Simplify right side
    218.54x = 50,528.24
  5. Step 5: Solve for x
    x = 50,528.24/218.54
  6. Step 6: Final answer
    x = 231.21

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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.