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Finding the Fourth Proportional to 274.46, 379.22 and 212.15

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Solution

The fourth proportional to 274.46, 379.22 and 212.15 is: 293.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.46 : 379.22 = 212.15 : x
  2. Step 2: Convert to fraction form
    274.46/379.22 = 212.15/x
  3. Step 3: Cross multiply
    274.46x = 379.22 × 212.15
  4. Step 4: Simplify right side
    274.46x = 80,451.41
  5. Step 5: Solve for x
    x = 80,451.41/274.46
  6. Step 6: Final answer
    x = 293.13

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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.