Home / 2,138.54-2,951.26-1,288.04

Finding the Fourth Proportional to 2,138.54, 2,951.26 and 1,288.04

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Solution

The fourth proportional to 2,138.54, 2,951.26 and 1,288.04 is: 1,777.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.54 : 2,951.26 = 1,288.04 : x
  2. Step 2: Convert to fraction form
    2,138.54/2,951.26 = 1,288.04/x
  3. Step 3: Cross multiply
    2,138.54x = 2,951.26 × 1,288.04
  4. Step 4: Simplify right side
    2,138.54x = 3,801,340.93
  5. Step 5: Solve for x
    x = 3,801,340.93/2,138.54
  6. Step 6: Final answer
    x = 1,777.54

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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.