Home / 2,629.75-3,944.49-780.88

Finding the Fourth Proportional to 2,629.75, 3,944.49 and 780.88

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Solution

The fourth proportional to 2,629.75, 3,944.49 and 780.88 is: 1,171.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,629.75 : 3,944.49 = 780.88 : x
  2. Step 2: Convert to fraction form
    2,629.75/3,944.49 = 780.88/x
  3. Step 3: Cross multiply
    2,629.75x = 3,944.49 × 780.88
  4. Step 4: Simplify right side
    2,629.75x = 3,080,160.56
  5. Step 5: Solve for x
    x = 3,080,160.56/2,629.75
  6. Step 6: Final answer
    x = 1,171.28

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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.