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Finding the Fourth Proportional to 276.80, 415.35 and 161.07

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Solution

The fourth proportional to 276.80, 415.35 and 161.07 is: 241.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.80 : 415.35 = 161.07 : x
  2. Step 2: Convert to fraction form
    276.80/415.35 = 161.07/x
  3. Step 3: Cross multiply
    276.80x = 415.35 × 161.07
  4. Step 4: Simplify right side
    276.80x = 66,901.66
  5. Step 5: Solve for x
    x = 66,901.66/276.80
  6. Step 6: Final answer
    x = 241.70

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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.