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Finding the Fourth Proportional to 817.92, 1,226.37 and 539.97

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Solution

The fourth proportional to 817.92, 1,226.37 and 539.97 is: 809.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    817.92 : 1,226.37 = 539.97 : x
  2. Step 2: Convert to fraction form
    817.92/1,226.37 = 539.97/x
  3. Step 3: Cross multiply
    817.92x = 1,226.37 × 539.97
  4. Step 4: Simplify right side
    817.92x = 662,207.06
  5. Step 5: Solve for x
    x = 662,207.06/817.92
  6. Step 6: Final answer
    x = 809.62

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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.