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Finding the Fourth Proportional to 1,798.15, 2,694.95 and 809.91

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Solution

The fourth proportional to 1,798.15, 2,694.95 and 809.91 is: 1,213.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,798.15 : 2,694.95 = 809.91 : x
  2. Step 2: Convert to fraction form
    1,798.15/2,694.95 = 809.91/x
  3. Step 3: Cross multiply
    1,798.15x = 2,694.95 × 809.91
  4. Step 4: Simplify right side
    1,798.15x = 2,182,665.94
  5. Step 5: Solve for x
    x = 2,182,665.94/1,798.15
  6. Step 6: Final answer
    x = 1,213.84

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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.