Home / 1,912.87-2,639.96-1,250.09

Finding the Fourth Proportional to 1,912.87, 2,639.96 and 1,250.09

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Solution

The fourth proportional to 1,912.87, 2,639.96 and 1,250.09 is: 1,725.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.87 : 2,639.96 = 1,250.09 : x
  2. Step 2: Convert to fraction form
    1,912.87/2,639.96 = 1,250.09/x
  3. Step 3: Cross multiply
    1,912.87x = 2,639.96 × 1,250.09
  4. Step 4: Simplify right side
    1,912.87x = 3,300,187.60
  5. Step 5: Solve for x
    x = 3,300,187.60/1,912.87
  6. Step 6: Final answer
    x = 1,725.25

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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.