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Finding the Fourth Proportional to 215.01, 321.91 and 149.94

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Solution

The fourth proportional to 215.01, 321.91 and 149.94 is: 224.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.01 : 321.91 = 149.94 : x
  2. Step 2: Convert to fraction form
    215.01/321.91 = 149.94/x
  3. Step 3: Cross multiply
    215.01x = 321.91 × 149.94
  4. Step 4: Simplify right side
    215.01x = 48,266.81
  5. Step 5: Solve for x
    x = 48,266.81/215.01
  6. Step 6: Final answer
    x = 224.49

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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.