Home / 2,977.56-4,128.84-2,879.28

Finding the Fourth Proportional to 2,977.56, 4,128.84 and 2,879.28

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Solution

The fourth proportional to 2,977.56, 4,128.84 and 2,879.28 is: 3,992.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,977.56 : 4,128.84 = 2,879.28 : x
  2. Step 2: Convert to fraction form
    2,977.56/4,128.84 = 2,879.28/x
  3. Step 3: Cross multiply
    2,977.56x = 4,128.84 × 2,879.28
  4. Step 4: Simplify right side
    2,977.56x = 11,888,086.44
  5. Step 5: Solve for x
    x = 11,888,086.44/2,977.56
  6. Step 6: Final answer
    x = 3,992.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.