Home / 3,428.22-5,142.26-831.18

Finding the Fourth Proportional to 3,428.22, 5,142.26 and 831.18

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Solution

The fourth proportional to 3,428.22, 5,142.26 and 831.18 is: 1,246.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,428.22 : 5,142.26 = 831.18 : x
  2. Step 2: Convert to fraction form
    3,428.22/5,142.26 = 831.18/x
  3. Step 3: Cross multiply
    3,428.22x = 5,142.26 × 831.18
  4. Step 4: Simplify right side
    3,428.22x = 4,274,143.67
  5. Step 5: Solve for x
    x = 4,274,143.67/3,428.22
  6. Step 6: Final answer
    x = 1,246.75

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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.