Home / 2,100.40-3,147.66-1,222.36

Finding the Fourth Proportional to 2,100.40, 3,147.66 and 1,222.36

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Solution

The fourth proportional to 2,100.40, 3,147.66 and 1,222.36 is: 1,831.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,100.40 : 3,147.66 = 1,222.36 : x
  2. Step 2: Convert to fraction form
    2,100.40/3,147.66 = 1,222.36/x
  3. Step 3: Cross multiply
    2,100.40x = 3,147.66 × 1,222.36
  4. Step 4: Simplify right side
    2,100.40x = 3,847,565.81
  5. Step 5: Solve for x
    x = 3,847,565.81/2,100.40
  6. Step 6: Final answer
    x = 1,831.83

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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.