Home / 2,279.43-3,143.46-2,109.75

Finding the Fourth Proportional to 2,279.43, 3,143.46 and 2,109.75

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Solution

The fourth proportional to 2,279.43, 3,143.46 and 2,109.75 is: 2,909.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,279.43 : 3,143.46 = 2,109.75 : x
  2. Step 2: Convert to fraction form
    2,279.43/3,143.46 = 2,109.75/x
  3. Step 3: Cross multiply
    2,279.43x = 3,143.46 × 2,109.75
  4. Step 4: Simplify right side
    2,279.43x = 6,631,914.74
  5. Step 5: Solve for x
    x = 6,631,914.74/2,279.43
  6. Step 6: Final answer
    x = 2,909.46

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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.