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Finding the Fourth Proportional to 274.76, 379 and 169.90

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Solution

The fourth proportional to 274.76, 379 and 169.90 is: 234.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.76 : 379 = 169.90 : x
  2. Step 2: Convert to fraction form
    274.76/379 = 169.90/x
  3. Step 3: Cross multiply
    274.76x = 379 × 169.90
  4. Step 4: Simplify right side
    274.76x = 64,392.10
  5. Step 5: Solve for x
    x = 64,392.10/274.76
  6. Step 6: Final answer
    x = 234.36

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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.