Home / 3,811.80-5,717.55-1,214.64

Finding the Fourth Proportional to 3,811.80, 5,717.55 and 1,214.64

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Solution

The fourth proportional to 3,811.80, 5,717.55 and 1,214.64 is: 1,821.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,811.80 : 5,717.55 = 1,214.64 : x
  2. Step 2: Convert to fraction form
    3,811.80/5,717.55 = 1,214.64/x
  3. Step 3: Cross multiply
    3,811.80x = 5,717.55 × 1,214.64
  4. Step 4: Simplify right side
    3,811.80x = 6,944,764.93
  5. Step 5: Solve for x
    x = 6,944,764.93/3,811.80
  6. Step 6: Final answer
    x = 1,821.91

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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.