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Finding the Fourth Proportional to 371.09, 512.08 and 213.61

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Solution

The fourth proportional to 371.09, 512.08 and 213.61 is: 294.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.09 : 512.08 = 213.61 : x
  2. Step 2: Convert to fraction form
    371.09/512.08 = 213.61/x
  3. Step 3: Cross multiply
    371.09x = 512.08 × 213.61
  4. Step 4: Simplify right side
    371.09x = 109,385.41
  5. Step 5: Solve for x
    x = 109,385.41/371.09
  6. Step 6: Final answer
    x = 294.77

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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.