Home / 2,399.18-3,309.92-1,928.30

Finding the Fourth Proportional to 2,399.18, 3,309.92 and 1,928.30

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Solution

The fourth proportional to 2,399.18, 3,309.92 and 1,928.30 is: 2,660.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,399.18 : 3,309.92 = 1,928.30 : x
  2. Step 2: Convert to fraction form
    2,399.18/3,309.92 = 1,928.30/x
  3. Step 3: Cross multiply
    2,399.18x = 3,309.92 × 1,928.30
  4. Step 4: Simplify right side
    2,399.18x = 6,382,518.74
  5. Step 5: Solve for x
    x = 6,382,518.74/2,399.18
  6. Step 6: Final answer
    x = 2,660.29

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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.