Home / 2,125.91-3,190.79-1,139.54

Finding the Fourth Proportional to 2,125.91, 3,190.79 and 1,139.54

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Solution

The fourth proportional to 2,125.91, 3,190.79 and 1,139.54 is: 1,710.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.91 : 3,190.79 = 1,139.54 : x
  2. Step 2: Convert to fraction form
    2,125.91/3,190.79 = 1,139.54/x
  3. Step 3: Cross multiply
    2,125.91x = 3,190.79 × 1,139.54
  4. Step 4: Simplify right side
    2,125.91x = 3,636,019.73
  5. Step 5: Solve for x
    x = 3,636,019.73/2,125.91
  6. Step 6: Final answer
    x = 1,710.33

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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.