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Finding the Fourth Proportional to 276.80, 415.26 and 161.30

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Solution

The fourth proportional to 276.80, 415.26 and 161.30 is: 241.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.80 : 415.26 = 161.30 : x
  2. Step 2: Convert to fraction form
    276.80/415.26 = 161.30/x
  3. Step 3: Cross multiply
    276.80x = 415.26 × 161.30
  4. Step 4: Simplify right side
    276.80x = 66,981.44
  5. Step 5: Solve for x
    x = 66,981.44/276.80
  6. Step 6: Final answer
    x = 241.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.