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Finding the Fourth Proportional to 1,414.97, 2,120.78 and 798.96

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Solution

The fourth proportional to 1,414.97, 2,120.78 and 798.96 is: 1,197.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,414.97 : 2,120.78 = 798.96 : x
  2. Step 2: Convert to fraction form
    1,414.97/2,120.78 = 798.96/x
  3. Step 3: Cross multiply
    1,414.97x = 2,120.78 × 798.96
  4. Step 4: Simplify right side
    1,414.97x = 1,694,428.34
  5. Step 5: Solve for x
    x = 1,694,428.34/1,414.97
  6. Step 6: Final answer
    x = 1,197.50

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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.