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Finding the Fourth Proportional to 2,778.80, 4,163.40 and 1,804.40

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Solution

The fourth proportional to 2,778.80, 4,163.40 and 1,804.40 is: 2,703.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,778.80 : 4,163.40 = 1,804.40 : x
  2. Step 2: Convert to fraction form
    2,778.80/4,163.40 = 1,804.40/x
  3. Step 3: Cross multiply
    2,778.80x = 4,163.40 × 1,804.40
  4. Step 4: Simplify right side
    2,778.80x = 7,512,438.96
  5. Step 5: Solve for x
    x = 7,512,438.96/2,778.80
  6. Step 6: Final answer
    x = 2,703.48

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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.