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Finding the Fourth Proportional to 2,425.81, 3,638.73 and 694.44

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Solution

The fourth proportional to 2,425.81, 3,638.73 and 694.44 is: 1,041.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,425.81 : 3,638.73 = 694.44 : x
  2. Step 2: Convert to fraction form
    2,425.81/3,638.73 = 694.44/x
  3. Step 3: Cross multiply
    2,425.81x = 3,638.73 × 694.44
  4. Step 4: Simplify right side
    2,425.81x = 2,526,879.66
  5. Step 5: Solve for x
    x = 2,526,879.66/2,425.81
  6. Step 6: Final answer
    x = 1,041.66

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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.