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Finding the Fourth Proportional to 3,185.42, 4,778.42 and 994.14

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Solution

The fourth proportional to 3,185.42, 4,778.42 and 994.14 is: 1,491.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,185.42 : 4,778.42 = 994.14 : x
  2. Step 2: Convert to fraction form
    3,185.42/4,778.42 = 994.14/x
  3. Step 3: Cross multiply
    3,185.42x = 4,778.42 × 994.14
  4. Step 4: Simplify right side
    3,185.42x = 4,750,413.49
  5. Step 5: Solve for x
    x = 4,750,413.49/3,185.42
  6. Step 6: Final answer
    x = 1,491.30

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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.