Home / 2,790.89-4,180.75-1,679.70

Finding the Fourth Proportional to 2,790.89, 4,180.75 and 1,679.70

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Solution

The fourth proportional to 2,790.89, 4,180.75 and 1,679.70 is: 2,516.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.89 : 4,180.75 = 1,679.70 : x
  2. Step 2: Convert to fraction form
    2,790.89/4,180.75 = 1,679.70/x
  3. Step 3: Cross multiply
    2,790.89x = 4,180.75 × 1,679.70
  4. Step 4: Simplify right side
    2,790.89x = 7,022,405.78
  5. Step 5: Solve for x
    x = 7,022,405.78/2,790.89
  6. Step 6: Final answer
    x = 2,516.19

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1.5x scale

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.