Home / 3,843.50-5,765.40-1,212.80

Finding the Fourth Proportional to 3,843.50, 5,765.40 and 1,212.80

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Solution

The fourth proportional to 3,843.50, 5,765.40 and 1,212.80 is: 1,819.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,843.50 : 5,765.40 = 1,212.80 : x
  2. Step 2: Convert to fraction form
    3,843.50/5,765.40 = 1,212.80/x
  3. Step 3: Cross multiply
    3,843.50x = 5,765.40 × 1,212.80
  4. Step 4: Simplify right side
    3,843.50x = 6,992,277.12
  5. Step 5: Solve for x
    x = 6,992,277.12/3,843.50
  6. Step 6: Final answer
    x = 1,819.25

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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.