Home / 2,629.85-3,944.75-780.81

Finding the Fourth Proportional to 2,629.85, 3,944.75 and 780.81

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Solution

The fourth proportional to 2,629.85, 3,944.75 and 780.81 is: 1,171.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,629.85 : 3,944.75 = 780.81 : x
  2. Step 2: Convert to fraction form
    2,629.85/3,944.75 = 780.81/x
  3. Step 3: Cross multiply
    2,629.85x = 3,944.75 × 780.81
  4. Step 4: Simplify right side
    2,629.85x = 3,080,100.25
  5. Step 5: Solve for x
    x = 3,080,100.25/2,629.85
  6. Step 6: Final answer
    x = 1,171.21

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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.