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Finding the Fourth Proportional to 3,859.18, 5,787.40 and 1,393.34

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Solution

The fourth proportional to 3,859.18, 5,787.40 and 1,393.34 is: 2,089.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,859.18 : 5,787.40 = 1,393.34 : x
  2. Step 2: Convert to fraction form
    3,859.18/5,787.40 = 1,393.34/x
  3. Step 3: Cross multiply
    3,859.18x = 5,787.40 × 1,393.34
  4. Step 4: Simplify right side
    3,859.18x = 8,063,786.11
  5. Step 5: Solve for x
    x = 8,063,786.11/3,859.18
  6. Step 6: Final answer
    x = 2,089.51

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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.