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Finding the Fourth Proportional to 2,883.28, 4,324.86 and 831.28

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Solution

The fourth proportional to 2,883.28, 4,324.86 and 831.28 is: 1,246.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,883.28 : 4,324.86 = 831.28 : x
  2. Step 2: Convert to fraction form
    2,883.28/4,324.86 = 831.28/x
  3. Step 3: Cross multiply
    2,883.28x = 4,324.86 × 831.28
  4. Step 4: Simplify right side
    2,883.28x = 3,595,169.62
  5. Step 5: Solve for x
    x = 3,595,169.62/2,883.28
  6. Step 6: Final answer
    x = 1,246.90

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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.