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Finding the Fourth Proportional to 218.89, 328.15 and 150.49

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Solution

The fourth proportional to 218.89, 328.15 and 150.49 is: 225.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.89 : 328.15 = 150.49 : x
  2. Step 2: Convert to fraction form
    218.89/328.15 = 150.49/x
  3. Step 3: Cross multiply
    218.89x = 328.15 × 150.49
  4. Step 4: Simplify right side
    218.89x = 49,383.29
  5. Step 5: Solve for x
    x = 49,383.29/218.89
  6. Step 6: Final answer
    x = 225.61

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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.