Home / 2,790.50-4,180.28-1,912.86

Finding the Fourth Proportional to 2,790.50, 4,180.28 and 1,912.86

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Solution

The fourth proportional to 2,790.50, 4,180.28 and 1,912.86 is: 2,865.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.50 : 4,180.28 = 1,912.86 : x
  2. Step 2: Convert to fraction form
    2,790.50/4,180.28 = 1,912.86/x
  3. Step 3: Cross multiply
    2,790.50x = 4,180.28 × 1,912.86
  4. Step 4: Simplify right side
    2,790.50x = 7,996,280.84
  5. Step 5: Solve for x
    x = 7,996,280.84/2,790.50
  6. Step 6: Final answer
    x = 2,865.54

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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.