Home / 2,120.92-3,179.28-889.16

Finding the Fourth Proportional to 2,120.92, 3,179.28 and 889.16

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Solution

The fourth proportional to 2,120.92, 3,179.28 and 889.16 is: 1,332.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.92 : 3,179.28 = 889.16 : x
  2. Step 2: Convert to fraction form
    2,120.92/3,179.28 = 889.16/x
  3. Step 3: Cross multiply
    2,120.92x = 3,179.28 × 889.16
  4. Step 4: Simplify right side
    2,120.92x = 2,826,888.60
  5. Step 5: Solve for x
    x = 2,826,888.60/2,120.92
  6. Step 6: Final answer
    x = 1,332.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.