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Finding the Fourth Proportional to 274.54, 411.60 and 213.80

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Solution

The fourth proportional to 274.54, 411.60 and 213.80 is: 320.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.54 : 411.60 = 213.80 : x
  2. Step 2: Convert to fraction form
    274.54/411.60 = 213.80/x
  3. Step 3: Cross multiply
    274.54x = 411.60 × 213.80
  4. Step 4: Simplify right side
    274.54x = 88,000.08
  5. Step 5: Solve for x
    x = 88,000.08/274.54
  6. Step 6: Final answer
    x = 320.54

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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.