Home / 3,428.89-5,143.30-831.83

Finding the Fourth Proportional to 3,428.89, 5,143.30 and 831.83

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Solution

The fourth proportional to 3,428.89, 5,143.30 and 831.83 is: 1,247.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,428.89 : 5,143.30 = 831.83 : x
  2. Step 2: Convert to fraction form
    3,428.89/5,143.30 = 831.83/x
  3. Step 3: Cross multiply
    3,428.89x = 5,143.30 × 831.83
  4. Step 4: Simplify right side
    3,428.89x = 4,278,323.44
  5. Step 5: Solve for x
    x = 4,278,323.44/3,428.89
  6. Step 6: Final answer
    x = 1,247.73

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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.