Home / 1,276.92-1,917-1,072.80

Finding the Fourth Proportional to 1,276.92, 1,917 and 1,072.80

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Solution

The fourth proportional to 1,276.92, 1,917 and 1,072.80 is: 1,610.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.92 : 1,917 = 1,072.80 : x
  2. Step 2: Convert to fraction form
    1,276.92/1,917 = 1,072.80/x
  3. Step 3: Cross multiply
    1,276.92x = 1,917 × 1,072.80
  4. Step 4: Simplify right side
    1,276.92x = 2,056,557.60
  5. Step 5: Solve for x
    x = 2,056,557.60/1,276.92
  6. Step 6: Final answer
    x = 1,610.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.