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Finding the Fourth Proportional to 824.12, 1,236.27 and 276.35

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Solution

The fourth proportional to 824.12, 1,236.27 and 276.35 is: 414.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.12 : 1,236.27 = 276.35 : x
  2. Step 2: Convert to fraction form
    824.12/1,236.27 = 276.35/x
  3. Step 3: Cross multiply
    824.12x = 1,236.27 × 276.35
  4. Step 4: Simplify right side
    824.12x = 341,637.03
  5. Step 5: Solve for x
    x = 341,637.03/824.12
  6. Step 6: Final answer
    x = 414.55

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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.