Home / 3,221.11-4,831.97-1,272.86

Finding the Fourth Proportional to 3,221.11, 4,831.97 and 1,272.86

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Solution

The fourth proportional to 3,221.11, 4,831.97 and 1,272.86 is: 1,909.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,221.11 : 4,831.97 = 1,272.86 : x
  2. Step 2: Convert to fraction form
    3,221.11/4,831.97 = 1,272.86/x
  3. Step 3: Cross multiply
    3,221.11x = 4,831.97 × 1,272.86
  4. Step 4: Simplify right side
    3,221.11x = 6,150,390.81
  5. Step 5: Solve for x
    x = 6,150,390.81/3,221.11
  6. Step 6: Final answer
    x = 1,909.40

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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.