Home / 2,815.20-4,222.80-1,255.95

Finding the Fourth Proportional to 2,815.20, 4,222.80 and 1,255.95

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Solution

The fourth proportional to 2,815.20, 4,222.80 and 1,255.95 is: 1,883.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.20 : 4,222.80 = 1,255.95 : x
  2. Step 2: Convert to fraction form
    2,815.20/4,222.80 = 1,255.95/x
  3. Step 3: Cross multiply
    2,815.20x = 4,222.80 × 1,255.95
  4. Step 4: Simplify right side
    2,815.20x = 5,303,625.66
  5. Step 5: Solve for x
    x = 5,303,625.66/2,815.20
  6. Step 6: Final answer
    x = 1,883.93

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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.