Home / 3,112.56-4,640.00-2,879.28

Finding the Fourth Proportional to 3,112.56, 4,640.00 and 2,879.28

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Solution

The fourth proportional to 3,112.56, 4,640.00 and 2,879.28 is: 4,292.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,112.56 : 4,640.00 = 2,879.28 : x
  2. Step 2: Convert to fraction form
    3,112.56/4,640.00 = 2,879.28/x
  3. Step 3: Cross multiply
    3,112.56x = 4,640.00 × 2,879.28
  4. Step 4: Simplify right side
    3,112.56x = 13,359,844.80
  5. Step 5: Solve for x
    x = 13,359,844.80/3,112.56
  6. Step 6: Final answer
    x = 4,292.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.