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Finding the Fourth Proportional to 2,276.71, 3,413.00 and 815.54

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Solution

The fourth proportional to 2,276.71, 3,413.00 and 815.54 is: 1,222.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,276.71 : 3,413.00 = 815.54 : x
  2. Step 2: Convert to fraction form
    2,276.71/3,413.00 = 815.54/x
  3. Step 3: Cross multiply
    2,276.71x = 3,413.00 × 815.54
  4. Step 4: Simplify right side
    2,276.71x = 2,783,422.99
  5. Step 5: Solve for x
    x = 2,783,422.99/2,276.71
  6. Step 6: Final answer
    x = 1,222.57

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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.