Home / 1,912.17-2,638.77-1,072.89

Finding the Fourth Proportional to 1,912.17, 2,638.77 and 1,072.89

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Solution

The fourth proportional to 1,912.17, 2,638.77 and 1,072.89 is: 1,480.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.17 : 2,638.77 = 1,072.89 : x
  2. Step 2: Convert to fraction form
    1,912.17/2,638.77 = 1,072.89/x
  3. Step 3: Cross multiply
    1,912.17x = 2,638.77 × 1,072.89
  4. Step 4: Simplify right side
    1,912.17x = 2,831,109.95
  5. Step 5: Solve for x
    x = 2,831,109.95/1,912.17
  6. Step 6: Final answer
    x = 1,480.57

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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.