Home / 1,912.63-2,639.99-1,249.59

Finding the Fourth Proportional to 1,912.63, 2,639.99 and 1,249.59

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Solution

The fourth proportional to 1,912.63, 2,639.99 and 1,249.59 is: 1,724.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.63 : 2,639.99 = 1,249.59 : x
  2. Step 2: Convert to fraction form
    1,912.63/2,639.99 = 1,249.59/x
  3. Step 3: Cross multiply
    1,912.63x = 2,639.99 × 1,249.59
  4. Step 4: Simplify right side
    1,912.63x = 3,298,905.10
  5. Step 5: Solve for x
    x = 3,298,905.10/1,912.63
  6. Step 6: Final answer
    x = 1,724.80

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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.