Home / 2,680.55-4,021.01-831.42

Finding the Fourth Proportional to 2,680.55, 4,021.01 and 831.42

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Solution

The fourth proportional to 2,680.55, 4,021.01 and 831.42 is: 1,247.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,680.55 : 4,021.01 = 831.42 : x
  2. Step 2: Convert to fraction form
    2,680.55/4,021.01 = 831.42/x
  3. Step 3: Cross multiply
    2,680.55x = 4,021.01 × 831.42
  4. Step 4: Simplify right side
    2,680.55x = 3,343,128.03
  5. Step 5: Solve for x
    x = 3,343,128.03/2,680.55
  6. Step 6: Final answer
    x = 1,247.18

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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.