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Finding the Fourth Proportional to 2,625.72, 3,938.60 and 677.94

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Solution

The fourth proportional to 2,625.72, 3,938.60 and 677.94 is: 1,016.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,625.72 : 3,938.60 = 677.94 : x
  2. Step 2: Convert to fraction form
    2,625.72/3,938.60 = 677.94/x
  3. Step 3: Cross multiply
    2,625.72x = 3,938.60 × 677.94
  4. Step 4: Simplify right side
    2,625.72x = 2,670,131.09
  5. Step 5: Solve for x
    x = 2,670,131.09/2,625.72
  6. Step 6: Final answer
    x = 1,016.91

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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.