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Finding the Fourth Proportional to 1,195.80, 1,793.22 and 426.12

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Solution

The fourth proportional to 1,195.80, 1,793.22 and 426.12 is: 639.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,195.80 : 1,793.22 = 426.12 : x
  2. Step 2: Convert to fraction form
    1,195.80/1,793.22 = 426.12/x
  3. Step 3: Cross multiply
    1,195.80x = 1,793.22 × 426.12
  4. Step 4: Simplify right side
    1,195.80x = 764,126.91
  5. Step 5: Solve for x
    x = 764,126.91/1,195.80
  6. Step 6: Final answer
    x = 639.01

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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.