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Finding the Fourth Proportional to 1,198.68, 1,797.36 and 418.62

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Solution

The fourth proportional to 1,198.68, 1,797.36 and 418.62 is: 627.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,198.68 : 1,797.36 = 418.62 : x
  2. Step 2: Convert to fraction form
    1,198.68/1,797.36 = 418.62/x
  3. Step 3: Cross multiply
    1,198.68x = 1,797.36 × 418.62
  4. Step 4: Simplify right side
    1,198.68x = 752,410.84
  5. Step 5: Solve for x
    x = 752,410.84/1,198.68
  6. Step 6: Final answer
    x = 627.70

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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.