Home / 2,279.80-3,144.70-1,439.80

Finding the Fourth Proportional to 2,279.80, 3,144.70 and 1,439.80

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Solution

The fourth proportional to 2,279.80, 3,144.70 and 1,439.80 is: 1,986.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,279.80 : 3,144.70 = 1,439.80 : x
  2. Step 2: Convert to fraction form
    2,279.80/3,144.70 = 1,439.80/x
  3. Step 3: Cross multiply
    2,279.80x = 3,144.70 × 1,439.80
  4. Step 4: Simplify right side
    2,279.80x = 4,527,739.06
  5. Step 5: Solve for x
    x = 4,527,739.06/2,279.80
  6. Step 6: Final answer
    x = 1,986.02

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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.