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Finding the Fourth Proportional to 274.20, 377.46 and 208.68

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Solution

The fourth proportional to 274.20, 377.46 and 208.68 is: 287.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.20 : 377.46 = 208.68 : x
  2. Step 2: Convert to fraction form
    274.20/377.46 = 208.68/x
  3. Step 3: Cross multiply
    274.20x = 377.46 × 208.68
  4. Step 4: Simplify right side
    274.20x = 78,768.35
  5. Step 5: Solve for x
    x = 78,768.35/274.20
  6. Step 6: Final answer
    x = 287.27

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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.