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Finding the Fourth Proportional to 199.28, 274.76 and 140.96

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Solution

The fourth proportional to 199.28, 274.76 and 140.96 is: 194.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.28 : 274.76 = 140.96 : x
  2. Step 2: Convert to fraction form
    199.28/274.76 = 140.96/x
  3. Step 3: Cross multiply
    199.28x = 274.76 × 140.96
  4. Step 4: Simplify right side
    199.28x = 38,730.17
  5. Step 5: Solve for x
    x = 38,730.17/199.28
  6. Step 6: Final answer
    x = 194.35

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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.