Home / 2,680.26-4,020.32-831.30

Finding the Fourth Proportional to 2,680.26, 4,020.32 and 831.30

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Solution

The fourth proportional to 2,680.26, 4,020.32 and 831.30 is: 1,246.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,680.26 : 4,020.32 = 831.30 : x
  2. Step 2: Convert to fraction form
    2,680.26/4,020.32 = 831.30/x
  3. Step 3: Cross multiply
    2,680.26x = 4,020.32 × 831.30
  4. Step 4: Simplify right side
    2,680.26x = 3,342,092.02
  5. Step 5: Solve for x
    x = 3,342,092.02/2,680.26
  6. Step 6: Final answer
    x = 1,246.93

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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.