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Finding the Fourth Proportional to 274.90, 379.32 and 158.44

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Solution

The fourth proportional to 274.90, 379.32 and 158.44 is: 218.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.90 : 379.32 = 158.44 : x
  2. Step 2: Convert to fraction form
    274.90/379.32 = 158.44/x
  3. Step 3: Cross multiply
    274.90x = 379.32 × 158.44
  4. Step 4: Simplify right side
    274.90x = 60,099.46
  5. Step 5: Solve for x
    x = 60,099.46/274.90
  6. Step 6: Final answer
    x = 218.62

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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.