Home / 2,131.38-3,195.18-831.87

Finding the Fourth Proportional to 2,131.38, 3,195.18 and 831.87

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Solution

The fourth proportional to 2,131.38, 3,195.18 and 831.87 is: 1,247.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,131.38 : 3,195.18 = 831.87 : x
  2. Step 2: Convert to fraction form
    2,131.38/3,195.18 = 831.87/x
  3. Step 3: Cross multiply
    2,131.38x = 3,195.18 × 831.87
  4. Step 4: Simplify right side
    2,131.38x = 2,657,974.39
  5. Step 5: Solve for x
    x = 2,657,974.39/2,131.38
  6. Step 6: Final answer
    x = 1,247.07

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1.5x scale

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.