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Finding the Fourth Proportional to 1,200.82, 1,801.39 and 378.82

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Solution

The fourth proportional to 1,200.82, 1,801.39 and 378.82 is: 568.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,200.82 : 1,801.39 = 378.82 : x
  2. Step 2: Convert to fraction form
    1,200.82/1,801.39 = 378.82/x
  3. Step 3: Cross multiply
    1,200.82x = 1,801.39 × 378.82
  4. Step 4: Simplify right side
    1,200.82x = 682,402.56
  5. Step 5: Solve for x
    x = 682,402.56/1,200.82
  6. Step 6: Final answer
    x = 568.28

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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.