Home / 2,790.72-3,847.92-1,907.04

Finding the Fourth Proportional to 2,790.72, 3,847.92 and 1,907.04

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Solution

The fourth proportional to 2,790.72, 3,847.92 and 1,907.04 is: 2,629.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.72 : 3,847.92 = 1,907.04 : x
  2. Step 2: Convert to fraction form
    2,790.72/3,847.92 = 1,907.04/x
  3. Step 3: Cross multiply
    2,790.72x = 3,847.92 × 1,907.04
  4. Step 4: Simplify right side
    2,790.72x = 7,338,137.36
  5. Step 5: Solve for x
    x = 7,338,137.36/2,790.72
  6. Step 6: Final answer
    x = 2,629.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.