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Finding the Fourth Proportional to 199.26, 274.68 and 159.86

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Solution

The fourth proportional to 199.26, 274.68 and 159.86 is: 220.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.26 : 274.68 = 159.86 : x
  2. Step 2: Convert to fraction form
    199.26/274.68 = 159.86/x
  3. Step 3: Cross multiply
    199.26x = 274.68 × 159.86
  4. Step 4: Simplify right side
    199.26x = 43,911.03
  5. Step 5: Solve for x
    x = 43,911.03/199.26
  6. Step 6: Final answer
    x = 220.37

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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.