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Finding the Fourth Proportional to 2,798.92, 4,198.38 and 851.05

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Solution

The fourth proportional to 2,798.92, 4,198.38 and 851.05 is: 1,276.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,798.92 : 4,198.38 = 851.05 : x
  2. Step 2: Convert to fraction form
    2,798.92/4,198.38 = 851.05/x
  3. Step 3: Cross multiply
    2,798.92x = 4,198.38 × 851.05
  4. Step 4: Simplify right side
    2,798.92x = 3,573,031.30
  5. Step 5: Solve for x
    x = 3,573,031.30/2,798.92
  6. Step 6: Final answer
    x = 1,276.58

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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.