Home / 2,286.20-3,153.93-1,389.80

Finding the Fourth Proportional to 2,286.20, 3,153.93 and 1,389.80

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Solution

The fourth proportional to 2,286.20, 3,153.93 and 1,389.80 is: 1,917.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,286.20 : 3,153.93 = 1,389.80 : x
  2. Step 2: Convert to fraction form
    2,286.20/3,153.93 = 1,389.80/x
  3. Step 3: Cross multiply
    2,286.20x = 3,153.93 × 1,389.80
  4. Step 4: Simplify right side
    2,286.20x = 4,383,331.91
  5. Step 5: Solve for x
    x = 4,383,331.91/2,286.20
  6. Step 6: Final answer
    x = 1,917.30

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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.