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Finding the Fourth Proportional to 371.63, 512.89 and 216.38

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Solution

The fourth proportional to 371.63, 512.89 and 216.38 is: 298.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.63 : 512.89 = 216.38 : x
  2. Step 2: Convert to fraction form
    371.63/512.89 = 216.38/x
  3. Step 3: Cross multiply
    371.63x = 512.89 × 216.38
  4. Step 4: Simplify right side
    371.63x = 110,976.03
  5. Step 5: Solve for x
    x = 110,976.03/371.63
  6. Step 6: Final answer
    x = 298.62

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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.