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Finding the Fourth Proportional to 809.92, 1,213.03 and 484.62

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Solution

The fourth proportional to 809.92, 1,213.03 and 484.62 is: 725.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    809.92 : 1,213.03 = 484.62 : x
  2. Step 2: Convert to fraction form
    809.92/1,213.03 = 484.62/x
  3. Step 3: Cross multiply
    809.92x = 1,213.03 × 484.62
  4. Step 4: Simplify right side
    809.92x = 587,858.60
  5. Step 5: Solve for x
    x = 587,858.60/809.92
  6. Step 6: Final answer
    x = 725.82

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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.