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Finding the Fourth Proportional to 3,781, 5,673.66 and 1,729

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Solution

The fourth proportional to 3,781, 5,673.66 and 1,729 is: 2,594.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781 : 5,673.66 = 1,729 : x
  2. Step 2: Convert to fraction form
    3,781/5,673.66 = 1,729/x
  3. Step 3: Cross multiply
    3,781x = 5,673.66 × 1,729
  4. Step 4: Simplify right side
    3,781x = 9,809,758.14
  5. Step 5: Solve for x
    x = 9,809,758.14/3,781
  6. Step 6: Final answer
    x = 2,594.49

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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.