Home / 2,790.43-4,186.32-1,288.74

Finding the Fourth Proportional to 2,790.43, 4,186.32 and 1,288.74

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Solution

The fourth proportional to 2,790.43, 4,186.32 and 1,288.74 is: 1,933.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.43 : 4,186.32 = 1,288.74 : x
  2. Step 2: Convert to fraction form
    2,790.43/4,186.32 = 1,288.74/x
  3. Step 3: Cross multiply
    2,790.43x = 4,186.32 × 1,288.74
  4. Step 4: Simplify right side
    2,790.43x = 5,395,098.57
  5. Step 5: Solve for x
    x = 5,395,098.57/2,790.43
  6. Step 6: Final answer
    x = 1,933.43

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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.