Home / 2,831.80-4,246.31-1,187.90

Finding the Fourth Proportional to 2,831.80, 4,246.31 and 1,187.90

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Solution

The fourth proportional to 2,831.80, 4,246.31 and 1,187.90 is: 1,781.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,831.80 : 4,246.31 = 1,187.90 : x
  2. Step 2: Convert to fraction form
    2,831.80/4,246.31 = 1,187.90/x
  3. Step 3: Cross multiply
    2,831.80x = 4,246.31 × 1,187.90
  4. Step 4: Simplify right side
    2,831.80x = 5,044,194.62
  5. Step 5: Solve for x
    x = 5,044,194.62/2,831.80
  6. Step 6: Final answer
    x = 1,781.27

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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.