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Finding the Fourth Proportional to 1,198.60, 1,797.63 and 679.59

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Solution

The fourth proportional to 1,198.60, 1,797.63 and 679.59 is: 1,019.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,198.60 : 1,797.63 = 679.59 : x
  2. Step 2: Convert to fraction form
    1,198.60/1,797.63 = 679.59/x
  3. Step 3: Cross multiply
    1,198.60x = 1,797.63 × 679.59
  4. Step 4: Simplify right side
    1,198.60x = 1,221,648.82
  5. Step 5: Solve for x
    x = 1,221,648.82/1,198.60
  6. Step 6: Final answer
    x = 1,019.23

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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.