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Finding the Fourth Proportional to 274.08, 378.05 and 208.47

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Solution

The fourth proportional to 274.08, 378.05 and 208.47 is: 287.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.08 : 378.05 = 208.47 : x
  2. Step 2: Convert to fraction form
    274.08/378.05 = 208.47/x
  3. Step 3: Cross multiply
    274.08x = 378.05 × 208.47
  4. Step 4: Simplify right side
    274.08x = 78,811.04
  5. Step 5: Solve for x
    x = 78,811.04/274.08
  6. Step 6: Final answer
    x = 287.55

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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.