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Finding the Fourth Proportional to 215.05, 321.97 and 149.62

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Solution

The fourth proportional to 215.05, 321.97 and 149.62 is: 224.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.05 : 321.97 = 149.62 : x
  2. Step 2: Convert to fraction form
    215.05/321.97 = 149.62/x
  3. Step 3: Cross multiply
    215.05x = 321.97 × 149.62
  4. Step 4: Simplify right side
    215.05x = 48,173.15
  5. Step 5: Solve for x
    x = 48,173.15/215.05
  6. Step 6: Final answer
    x = 224.01

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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.