Home / 2,790.72-4,179.40-1,811.43

Finding the Fourth Proportional to 2,790.72, 4,179.40 and 1,811.43

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Solution

The fourth proportional to 2,790.72, 4,179.40 and 1,811.43 is: 2,712.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.72 : 4,179.40 = 1,811.43 : x
  2. Step 2: Convert to fraction form
    2,790.72/4,179.40 = 1,811.43/x
  3. Step 3: Cross multiply
    2,790.72x = 4,179.40 × 1,811.43
  4. Step 4: Simplify right side
    2,790.72x = 7,570,686.01
  5. Step 5: Solve for x
    x = 7,570,686.01/2,790.72
  6. Step 6: Final answer
    x = 2,712.81

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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.