Home / 3,086.25-4,629.38-777.75

Finding the Fourth Proportional to 3,086.25, 4,629.38 and 777.75

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Solution

The fourth proportional to 3,086.25, 4,629.38 and 777.75 is: 1,166.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,086.25 : 4,629.38 = 777.75 : x
  2. Step 2: Convert to fraction form
    3,086.25/4,629.38 = 777.75/x
  3. Step 3: Cross multiply
    3,086.25x = 4,629.38 × 777.75
  4. Step 4: Simplify right side
    3,086.25x = 3,600,496.41
  5. Step 5: Solve for x
    x = 3,600,496.41/3,086.25
  6. Step 6: Final answer
    x = 1,166.63

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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.