Home / 2,188.78-3,020.49-1,257.28

Finding the Fourth Proportional to 2,188.78, 3,020.49 and 1,257.28

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Solution

The fourth proportional to 2,188.78, 3,020.49 and 1,257.28 is: 1,735.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,188.78 : 3,020.49 = 1,257.28 : x
  2. Step 2: Convert to fraction form
    2,188.78/3,020.49 = 1,257.28/x
  3. Step 3: Cross multiply
    2,188.78x = 3,020.49 × 1,257.28
  4. Step 4: Simplify right side
    2,188.78x = 3,797,601.67
  5. Step 5: Solve for x
    x = 3,797,601.67/2,188.78
  6. Step 6: Final answer
    x = 1,735.03

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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.