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Finding the Fourth Proportional to 3,185.35, 4,778.51 and 994.25

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Solution

The fourth proportional to 3,185.35, 4,778.51 and 994.25 is: 1,491.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,185.35 : 4,778.51 = 994.25 : x
  2. Step 2: Convert to fraction form
    3,185.35/4,778.51 = 994.25/x
  3. Step 3: Cross multiply
    3,185.35x = 4,778.51 × 994.25
  4. Step 4: Simplify right side
    3,185.35x = 4,751,028.60
  5. Step 5: Solve for x
    x = 4,751,028.60/3,185.35
  6. Step 6: Final answer
    x = 1,491.52

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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.