Home / 3,900.80-5,383.08-2,222.28

Finding the Fourth Proportional to 3,900.80, 5,383.08 and 2,222.28

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Solution

The fourth proportional to 3,900.80, 5,383.08 and 2,222.28 is: 3,066.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.80 : 5,383.08 = 2,222.28 : x
  2. Step 2: Convert to fraction form
    3,900.80/5,383.08 = 2,222.28/x
  3. Step 3: Cross multiply
    3,900.80x = 5,383.08 × 2,222.28
  4. Step 4: Simplify right side
    3,900.80x = 11,962,690.84
  5. Step 5: Solve for x
    x = 11,962,690.84/3,900.80
  6. Step 6: Final answer
    x = 3,066.73

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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.