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Finding the Fourth Proportional to 2,042.80, 3,063.30 and 809.80

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Solution

The fourth proportional to 2,042.80, 3,063.30 and 809.80 is: 1,214.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,042.80 : 3,063.30 = 809.80 : x
  2. Step 2: Convert to fraction form
    2,042.80/3,063.30 = 809.80/x
  3. Step 3: Cross multiply
    2,042.80x = 3,063.30 × 809.80
  4. Step 4: Simplify right side
    2,042.80x = 2,480,660.34
  5. Step 5: Solve for x
    x = 2,480,660.34/2,042.80
  6. Step 6: Final answer
    x = 1,214.34

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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.