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Finding the Fourth Proportional to 371.42, 557.27 and 217.41

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Solution

The fourth proportional to 371.42, 557.27 and 217.41 is: 326.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.42 : 557.27 = 217.41 : x
  2. Step 2: Convert to fraction form
    371.42/557.27 = 217.41/x
  3. Step 3: Cross multiply
    371.42x = 557.27 × 217.41
  4. Step 4: Simplify right side
    371.42x = 121,154.98
  5. Step 5: Solve for x
    x = 121,154.98/371.42
  6. Step 6: Final answer
    x = 326.20

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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.