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Finding the Fourth Proportional to 2,577.26, 3,866.50 and 845.78

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Solution

The fourth proportional to 2,577.26, 3,866.50 and 845.78 is: 1,268.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,577.26 : 3,866.50 = 845.78 : x
  2. Step 2: Convert to fraction form
    2,577.26/3,866.50 = 845.78/x
  3. Step 3: Cross multiply
    2,577.26x = 3,866.50 × 845.78
  4. Step 4: Simplify right side
    2,577.26x = 3,270,208.37
  5. Step 5: Solve for x
    x = 3,270,208.37/2,577.26
  6. Step 6: Final answer
    x = 1,268.87

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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.