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Finding the Fourth Proportional to 199.43, 274.61 and 180.90

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Solution

The fourth proportional to 199.43, 274.61 and 180.90 is: 249.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.43 : 274.61 = 180.90 : x
  2. Step 2: Convert to fraction form
    199.43/274.61 = 180.90/x
  3. Step 3: Cross multiply
    199.43x = 274.61 × 180.90
  4. Step 4: Simplify right side
    199.43x = 49,675.58
  5. Step 5: Solve for x
    x = 49,675.58/199.43
  6. Step 6: Final answer
    x = 249.09

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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.