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Finding the Fourth Proportional to 2,413.92, 3,619.38 and 853.72

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Solution

The fourth proportional to 2,413.92, 3,619.38 and 853.72 is: 1,280.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,413.92 : 3,619.38 = 853.72 : x
  2. Step 2: Convert to fraction form
    2,413.92/3,619.38 = 853.72/x
  3. Step 3: Cross multiply
    2,413.92x = 3,619.38 × 853.72
  4. Step 4: Simplify right side
    2,413.92x = 3,089,937.09
  5. Step 5: Solve for x
    x = 3,089,937.09/2,413.92
  6. Step 6: Final answer
    x = 1,280.05

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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.