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Finding the Fourth Proportional to 1,900.11, 2,850.55 and 667.56

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Solution

The fourth proportional to 1,900.11, 2,850.55 and 667.56 is: 1,001.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,900.11 : 2,850.55 = 667.56 : x
  2. Step 2: Convert to fraction form
    1,900.11/2,850.55 = 667.56/x
  3. Step 3: Cross multiply
    1,900.11x = 2,850.55 × 667.56
  4. Step 4: Simplify right side
    1,900.11x = 1,902,922.18
  5. Step 5: Solve for x
    x = 1,902,922.18/1,900.11
  6. Step 6: Final answer
    x = 1,001.48

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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.