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Finding the Fourth Proportional to 1,198.61, 1,797.15 and 505.09

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Solution

The fourth proportional to 1,198.61, 1,797.15 and 505.09 is: 757.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,198.61 : 1,797.15 = 505.09 : x
  2. Step 2: Convert to fraction form
    1,198.61/1,797.15 = 505.09/x
  3. Step 3: Cross multiply
    1,198.61x = 1,797.15 × 505.09
  4. Step 4: Simplify right side
    1,198.61x = 907,731.69
  5. Step 5: Solve for x
    x = 907,731.69/1,198.61
  6. Step 6: Final answer
    x = 757.32

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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.