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Finding the Fourth Proportional to 824.09, 1,236.30 and 268.95

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Solution

The fourth proportional to 824.09, 1,236.30 and 268.95 is: 403.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.09 : 1,236.30 = 268.95 : x
  2. Step 2: Convert to fraction form
    824.09/1,236.30 = 268.95/x
  3. Step 3: Cross multiply
    824.09x = 1,236.30 × 268.95
  4. Step 4: Simplify right side
    824.09x = 332,506.51
  5. Step 5: Solve for x
    x = 332,506.51/824.09
  6. Step 6: Final answer
    x = 403.48

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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.