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Finding the Fourth Proportional to 3,858.17, 5,786.05 and 1,392.67

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Solution

The fourth proportional to 3,858.17, 5,786.05 and 1,392.67 is: 2,088.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,858.17 : 5,786.05 = 1,392.67 : x
  2. Step 2: Convert to fraction form
    3,858.17/5,786.05 = 1,392.67/x
  3. Step 3: Cross multiply
    3,858.17x = 5,786.05 × 1,392.67
  4. Step 4: Simplify right side
    3,858.17x = 8,058,058.25
  5. Step 5: Solve for x
    x = 8,058,058.25/3,858.17
  6. Step 6: Final answer
    x = 2,088.57

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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.