Home / 1,912.73-2,638.91-1,214.51

Finding the Fourth Proportional to 1,912.73, 2,638.91 and 1,214.51

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Solution

The fourth proportional to 1,912.73, 2,638.91 and 1,214.51 is: 1,675.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.73 : 2,638.91 = 1,214.51 : x
  2. Step 2: Convert to fraction form
    1,912.73/2,638.91 = 1,214.51/x
  3. Step 3: Cross multiply
    1,912.73x = 2,638.91 × 1,214.51
  4. Step 4: Simplify right side
    1,912.73x = 3,204,972.43
  5. Step 5: Solve for x
    x = 3,204,972.43/1,912.73
  6. Step 6: Final answer
    x = 1,675.61

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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.