Home / 1,790.27-2,684.39-815.43

Finding the Fourth Proportional to 1,790.27, 2,684.39 and 815.43

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Solution

The fourth proportional to 1,790.27, 2,684.39 and 815.43 is: 1,222.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,790.27 : 2,684.39 = 815.43 : x
  2. Step 2: Convert to fraction form
    1,790.27/2,684.39 = 815.43/x
  3. Step 3: Cross multiply
    1,790.27x = 2,684.39 × 815.43
  4. Step 4: Simplify right side
    1,790.27x = 2,188,928.06
  5. Step 5: Solve for x
    x = 2,188,928.06/1,790.27
  6. Step 6: Final answer
    x = 1,222.68

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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.