Home / 2,911.24-4,366.19-831.20

Finding the Fourth Proportional to 2,911.24, 4,366.19 and 831.20

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Solution

The fourth proportional to 2,911.24, 4,366.19 and 831.20 is: 1,246.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,911.24 : 4,366.19 = 831.20 : x
  2. Step 2: Convert to fraction form
    2,911.24/4,366.19 = 831.20/x
  3. Step 3: Cross multiply
    2,911.24x = 4,366.19 × 831.20
  4. Step 4: Simplify right side
    2,911.24x = 3,629,177.13
  5. Step 5: Solve for x
    x = 3,629,177.13/2,911.24
  6. Step 6: Final answer
    x = 1,246.61

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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.