Home / 3,057.28-4,219.74-1,939.78

Finding the Fourth Proportional to 3,057.28, 4,219.74 and 1,939.78

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Solution

The fourth proportional to 3,057.28, 4,219.74 and 1,939.78 is: 2,677.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,057.28 : 4,219.74 = 1,939.78 : x
  2. Step 2: Convert to fraction form
    3,057.28/4,219.74 = 1,939.78/x
  3. Step 3: Cross multiply
    3,057.28x = 4,219.74 × 1,939.78
  4. Step 4: Simplify right side
    3,057.28x = 8,185,367.26
  5. Step 5: Solve for x
    x = 8,185,367.26/3,057.28
  6. Step 6: Final answer
    x = 2,677.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.