Home / 1,912.20-2,638.08-1,324.14

Finding the Fourth Proportional to 1,912.20, 2,638.08 and 1,324.14

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Solution

The fourth proportional to 1,912.20, 2,638.08 and 1,324.14 is: 1,826.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.20 : 2,638.08 = 1,324.14 : x
  2. Step 2: Convert to fraction form
    1,912.20/2,638.08 = 1,324.14/x
  3. Step 3: Cross multiply
    1,912.20x = 2,638.08 × 1,324.14
  4. Step 4: Simplify right side
    1,912.20x = 3,493,187.25
  5. Step 5: Solve for x
    x = 3,493,187.25/1,912.20
  6. Step 6: Final answer
    x = 1,826.79

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1.5x scale

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.