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Finding the Fourth Proportional to 371.08, 512.16 and 221.73

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Solution

The fourth proportional to 371.08, 512.16 and 221.73 is: 306.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.08 : 512.16 = 221.73 : x
  2. Step 2: Convert to fraction form
    371.08/512.16 = 221.73/x
  3. Step 3: Cross multiply
    371.08x = 512.16 × 221.73
  4. Step 4: Simplify right side
    371.08x = 113,561.24
  5. Step 5: Solve for x
    x = 113,561.24/371.08
  6. Step 6: Final answer
    x = 306.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.