Home / 3,413.64-5,120.40-1,105.20

Finding the Fourth Proportional to 3,413.64, 5,120.40 and 1,105.20

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Solution

The fourth proportional to 3,413.64, 5,120.40 and 1,105.20 is: 1,657.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,413.64 : 5,120.40 = 1,105.20 : x
  2. Step 2: Convert to fraction form
    3,413.64/5,120.40 = 1,105.20/x
  3. Step 3: Cross multiply
    3,413.64x = 5,120.40 × 1,105.20
  4. Step 4: Simplify right side
    3,413.64x = 5,659,066.08
  5. Step 5: Solve for x
    x = 5,659,066.08/3,413.64
  6. Step 6: Final answer
    x = 1,657.78

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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.