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Finding the Fourth Proportional to 2,276.73, 3,413.70 and 815.55

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Solution

The fourth proportional to 2,276.73, 3,413.70 and 815.55 is: 1,222.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,276.73 : 3,413.70 = 815.55 : x
  2. Step 2: Convert to fraction form
    2,276.73/3,413.70 = 815.55/x
  3. Step 3: Cross multiply
    2,276.73x = 3,413.70 × 815.55
  4. Step 4: Simplify right side
    2,276.73x = 2,784,043.04
  5. Step 5: Solve for x
    x = 2,784,043.04/2,276.73
  6. Step 6: Final answer
    x = 1,222.83

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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.