Home / 1,912.60-2,638.74-1,214.38

Finding the Fourth Proportional to 1,912.60, 2,638.74 and 1,214.38

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Solution

The fourth proportional to 1,912.60, 2,638.74 and 1,214.38 is: 1,675.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.60 : 2,638.74 = 1,214.38 : x
  2. Step 2: Convert to fraction form
    1,912.60/2,638.74 = 1,214.38/x
  3. Step 3: Cross multiply
    1,912.60x = 2,638.74 × 1,214.38
  4. Step 4: Simplify right side
    1,912.60x = 3,204,433.08
  5. Step 5: Solve for x
    x = 3,204,433.08/1,912.60
  6. Step 6: Final answer
    x = 1,675.43

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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.