Home / 2,813.42-4,221.05-1,351.78

Finding the Fourth Proportional to 2,813.42, 4,221.05 and 1,351.78

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Solution

The fourth proportional to 2,813.42, 4,221.05 and 1,351.78 is: 2,028.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,813.42 : 4,221.05 = 1,351.78 : x
  2. Step 2: Convert to fraction form
    2,813.42/4,221.05 = 1,351.78/x
  3. Step 3: Cross multiply
    2,813.42x = 4,221.05 × 1,351.78
  4. Step 4: Simplify right side
    2,813.42x = 5,705,913.66
  5. Step 5: Solve for x
    x = 5,705,913.66/2,813.42
  6. Step 6: Final answer
    x = 2,028.10

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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.