Home / 1,912.12-2,638.60-1,072.82

Finding the Fourth Proportional to 1,912.12, 2,638.60 and 1,072.82

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Solution

The fourth proportional to 1,912.12, 2,638.60 and 1,072.82 is: 1,480.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.12 : 2,638.60 = 1,072.82 : x
  2. Step 2: Convert to fraction form
    1,912.12/2,638.60 = 1,072.82/x
  3. Step 3: Cross multiply
    1,912.12x = 2,638.60 × 1,072.82
  4. Step 4: Simplify right side
    1,912.12x = 2,830,742.85
  5. Step 5: Solve for x
    x = 2,830,742.85/1,912.12
  6. Step 6: Final answer
    x = 1,480.42

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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.