Home / 3,198.09-4,413.18-1,781.70

Finding the Fourth Proportional to 3,198.09, 4,413.18 and 1,781.70

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Solution

The fourth proportional to 3,198.09, 4,413.18 and 1,781.70 is: 2,458.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,198.09 : 4,413.18 = 1,781.70 : x
  2. Step 2: Convert to fraction form
    3,198.09/4,413.18 = 1,781.70/x
  3. Step 3: Cross multiply
    3,198.09x = 4,413.18 × 1,781.70
  4. Step 4: Simplify right side
    3,198.09x = 7,862,962.81
  5. Step 5: Solve for x
    x = 7,862,962.81/3,198.09
  6. Step 6: Final answer
    x = 2,458.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.