Home / 1,912.69-2,638.32-1,249.53

Finding the Fourth Proportional to 1,912.69, 2,638.32 and 1,249.53

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Solution

The fourth proportional to 1,912.69, 2,638.32 and 1,249.53 is: 1,723.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.69 : 2,638.32 = 1,249.53 : x
  2. Step 2: Convert to fraction form
    1,912.69/2,638.32 = 1,249.53/x
  3. Step 3: Cross multiply
    1,912.69x = 2,638.32 × 1,249.53
  4. Step 4: Simplify right side
    1,912.69x = 3,296,652.44
  5. Step 5: Solve for x
    x = 3,296,652.44/1,912.69
  6. Step 6: Final answer
    x = 1,723.57

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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.