Home / 2,990.32-4,112.91-2,399.56

Finding the Fourth Proportional to 2,990.32, 4,112.91 and 2,399.56

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Solution

The fourth proportional to 2,990.32, 4,112.91 and 2,399.56 is: 3,300.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.32 : 4,112.91 = 2,399.56 : x
  2. Step 2: Convert to fraction form
    2,990.32/4,112.91 = 2,399.56/x
  3. Step 3: Cross multiply
    2,990.32x = 4,112.91 × 2,399.56
  4. Step 4: Simplify right side
    2,990.32x = 9,869,164.04
  5. Step 5: Solve for x
    x = 9,869,164.04/2,990.32
  6. Step 6: Final answer
    x = 3,300.37

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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.