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Finding the Fourth Proportional to 3,789.36, 5,679.42 and 1,708.81

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Solution

The fourth proportional to 3,789.36, 5,679.42 and 1,708.81 is: 2,561.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,789.36 : 5,679.42 = 1,708.81 : x
  2. Step 2: Convert to fraction form
    3,789.36/5,679.42 = 1,708.81/x
  3. Step 3: Cross multiply
    3,789.36x = 5,679.42 × 1,708.81
  4. Step 4: Simplify right side
    3,789.36x = 9,705,049.69
  5. Step 5: Solve for x
    x = 9,705,049.69/3,789.36
  6. Step 6: Final answer
    x = 2,561.13

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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.