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Finding the Fourth Proportional to 3,858.15, 5,787.23 and 1,392.96

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Solution

The fourth proportional to 3,858.15, 5,787.23 and 1,392.96 is: 2,089.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,858.15 : 5,787.23 = 1,392.96 : x
  2. Step 2: Convert to fraction form
    3,858.15/5,787.23 = 1,392.96/x
  3. Step 3: Cross multiply
    3,858.15x = 5,787.23 × 1,392.96
  4. Step 4: Simplify right side
    3,858.15x = 8,061,402.47
  5. Step 5: Solve for x
    x = 8,061,402.47/3,858.15
  6. Step 6: Final answer
    x = 2,089.45

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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.