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Finding the Fourth Proportional to 824.82, 1,236.91 and 276.85

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Solution

The fourth proportional to 824.82, 1,236.91 and 276.85 is: 415.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.82 : 1,236.91 = 276.85 : x
  2. Step 2: Convert to fraction form
    824.82/1,236.91 = 276.85/x
  3. Step 3: Cross multiply
    824.82x = 1,236.91 × 276.85
  4. Step 4: Simplify right side
    824.82x = 342,438.53
  5. Step 5: Solve for x
    x = 342,438.53/824.82
  6. Step 6: Final answer
    x = 415.17

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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.