Home / 1,942.21-2,907.82-1,789.12

Finding the Fourth Proportional to 1,942.21, 2,907.82 and 1,789.12

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Solution

The fourth proportional to 1,942.21, 2,907.82 and 1,789.12 is: 2,678.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,942.21 : 2,907.82 = 1,789.12 : x
  2. Step 2: Convert to fraction form
    1,942.21/2,907.82 = 1,789.12/x
  3. Step 3: Cross multiply
    1,942.21x = 2,907.82 × 1,789.12
  4. Step 4: Simplify right side
    1,942.21x = 5,202,438.92
  5. Step 5: Solve for x
    x = 5,202,438.92/1,942.21
  6. Step 6: Final answer
    x = 2,678.62

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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.