Home / 3,413.80-5,120.70-1,105.30

Finding the Fourth Proportional to 3,413.80, 5,120.70 and 1,105.30

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Solution

The fourth proportional to 3,413.80, 5,120.70 and 1,105.30 is: 1,657.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,413.80 : 5,120.70 = 1,105.30 : x
  2. Step 2: Convert to fraction form
    3,413.80/5,120.70 = 1,105.30/x
  3. Step 3: Cross multiply
    3,413.80x = 5,120.70 × 1,105.30
  4. Step 4: Simplify right side
    3,413.80x = 5,659,909.71
  5. Step 5: Solve for x
    x = 5,659,909.71/3,413.80
  6. Step 6: Final answer
    x = 1,657.95

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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.