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Finding the Fourth Proportional to 3,291.75, 4,542.69 and 1,965.21

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Solution

The fourth proportional to 3,291.75, 4,542.69 and 1,965.21 is: 2,712.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,291.75 : 4,542.69 = 1,965.21 : x
  2. Step 2: Convert to fraction form
    3,291.75/4,542.69 = 1,965.21/x
  3. Step 3: Cross multiply
    3,291.75x = 4,542.69 × 1,965.21
  4. Step 4: Simplify right side
    3,291.75x = 8,927,334.14
  5. Step 5: Solve for x
    x = 8,927,334.14/3,291.75
  6. Step 6: Final answer
    x = 2,712.03

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.