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Finding the Fourth Proportional to 7,198.40, 10,781.40 and 4,282.40

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Solution

The fourth proportional to 7,198.40, 10,781.40 and 4,282.40 is: 6,413.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,198.40 : 10,781.40 = 4,282.40 : x
  2. Step 2: Convert to fraction form
    7,198.40/10,781.40 = 4,282.40/x
  3. Step 3: Cross multiply
    7,198.40x = 10,781.40 × 4,282.40
  4. Step 4: Simplify right side
    7,198.40x = 46,170,267.36
  5. Step 5: Solve for x
    x = 46,170,267.36/7,198.40
  6. Step 6: Final answer
    x = 6,413.96

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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.