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Finding the Fourth Proportional to 2,413.53, 3,620.43 and 771.12

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Solution

The fourth proportional to 2,413.53, 3,620.43 and 771.12 is: 1,156.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,413.53 : 3,620.43 = 771.12 : x
  2. Step 2: Convert to fraction form
    2,413.53/3,620.43 = 771.12/x
  3. Step 3: Cross multiply
    2,413.53x = 3,620.43 × 771.12
  4. Step 4: Simplify right side
    2,413.53x = 2,791,785.98
  5. Step 5: Solve for x
    x = 2,791,785.98/2,413.53
  6. Step 6: Final answer
    x = 1,156.72

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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.