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Finding the Fourth Proportional to 276.86, 415.30 and 179.40

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Solution

The fourth proportional to 276.86, 415.30 and 179.40 is: 269.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.86 : 415.30 = 179.40 : x
  2. Step 2: Convert to fraction form
    276.86/415.30 = 179.40/x
  3. Step 3: Cross multiply
    276.86x = 415.30 × 179.40
  4. Step 4: Simplify right side
    276.86x = 74,504.82
  5. Step 5: Solve for x
    x = 74,504.82/276.86
  6. Step 6: Final answer
    x = 269.11

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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.