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Finding the Fourth Proportional to 199.28, 274.98 and 116.39

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Solution

The fourth proportional to 199.28, 274.98 and 116.39 is: 160.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.28 : 274.98 = 116.39 : x
  2. Step 2: Convert to fraction form
    199.28/274.98 = 116.39/x
  3. Step 3: Cross multiply
    199.28x = 274.98 × 116.39
  4. Step 4: Simplify right side
    199.28x = 32,003.55
  5. Step 5: Solve for x
    x = 32,003.55/199.28
  6. Step 6: Final answer
    x = 160.60

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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.