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Finding the Fourth Proportional to 274.76, 379.16 and 197.26

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Solution

The fourth proportional to 274.76, 379.16 and 197.26 is: 272.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.76 : 379.16 = 197.26 : x
  2. Step 2: Convert to fraction form
    274.76/379.16 = 197.26/x
  3. Step 3: Cross multiply
    274.76x = 379.16 × 197.26
  4. Step 4: Simplify right side
    274.76x = 74,793.10
  5. Step 5: Solve for x
    x = 74,793.10/274.76
  6. Step 6: Final answer
    x = 272.21

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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.