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Finding the Fourth Proportional to 274.05, 378.50 and 212.62

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Solution

The fourth proportional to 274.05, 378.50 and 212.62 is: 293.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.05 : 378.50 = 212.62 : x
  2. Step 2: Convert to fraction form
    274.05/378.50 = 212.62/x
  3. Step 3: Cross multiply
    274.05x = 378.50 × 212.62
  4. Step 4: Simplify right side
    274.05x = 80,476.08
  5. Step 5: Solve for x
    x = 80,476.08/274.05
  6. Step 6: Final answer
    x = 293.65

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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.