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Finding the Fourth Proportional to 824.19, 1,236.49 and 581.19

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Solution

The fourth proportional to 824.19, 1,236.49 and 581.19 is: 871.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.19 : 1,236.49 = 581.19 : x
  2. Step 2: Convert to fraction form
    824.19/1,236.49 = 581.19/x
  3. Step 3: Cross multiply
    824.19x = 1,236.49 × 581.19
  4. Step 4: Simplify right side
    824.19x = 718,635.62
  5. Step 5: Solve for x
    x = 718,635.62/824.19
  6. Step 6: Final answer
    x = 871.93

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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.