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Finding the Fourth Proportional to 3,859.38, 5,789.07 and 1,392.39

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Solution

The fourth proportional to 3,859.38, 5,789.07 and 1,392.39 is: 2,088.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,859.38 : 5,789.07 = 1,392.39 : x
  2. Step 2: Convert to fraction form
    3,859.38/5,789.07 = 1,392.39/x
  3. Step 3: Cross multiply
    3,859.38x = 5,789.07 × 1,392.39
  4. Step 4: Simplify right side
    3,859.38x = 8,060,643.18
  5. Step 5: Solve for x
    x = 8,060,643.18/3,859.38
  6. Step 6: Final answer
    x = 2,088.59

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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.