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Finding the Fourth Proportional to 3,189, 4,777.89 and 1,954.56

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Solution

The fourth proportional to 3,189, 4,777.89 and 1,954.56 is: 2,928.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,189 : 4,777.89 = 1,954.56 : x
  2. Step 2: Convert to fraction form
    3,189/4,777.89 = 1,954.56/x
  3. Step 3: Cross multiply
    3,189x = 4,777.89 × 1,954.56
  4. Step 4: Simplify right side
    3,189x = 9,338,672.68
  5. Step 5: Solve for x
    x = 9,338,672.68/3,189
  6. Step 6: Final answer
    x = 2,928.40

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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.