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Finding the Fourth Proportional to 371.94, 513.21 and 216.66

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Solution

The fourth proportional to 371.94, 513.21 and 216.66 is: 298.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.94 : 513.21 = 216.66 : x
  2. Step 2: Convert to fraction form
    371.94/513.21 = 216.66/x
  3. Step 3: Cross multiply
    371.94x = 513.21 × 216.66
  4. Step 4: Simplify right side
    371.94x = 111,192.08
  5. Step 5: Solve for x
    x = 111,192.08/371.94
  6. Step 6: Final answer
    x = 298.95

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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.