Home / 2,922.12-4,383.36-1,278.78

Finding the Fourth Proportional to 2,922.12, 4,383.36 and 1,278.78

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Solution

The fourth proportional to 2,922.12, 4,383.36 and 1,278.78 is: 1,918.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,922.12 : 4,383.36 = 1,278.78 : x
  2. Step 2: Convert to fraction form
    2,922.12/4,383.36 = 1,278.78/x
  3. Step 3: Cross multiply
    2,922.12x = 4,383.36 × 1,278.78
  4. Step 4: Simplify right side
    2,922.12x = 5,605,353.10
  5. Step 5: Solve for x
    x = 5,605,353.10/2,922.12
  6. Step 6: Final answer
    x = 1,918.25

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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.