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Finding the Fourth Proportional to 3,858.31, 5,787.80 and 1,085.01

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Solution

The fourth proportional to 3,858.31, 5,787.80 and 1,085.01 is: 1,627.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,858.31 : 5,787.80 = 1,085.01 : x
  2. Step 2: Convert to fraction form
    3,858.31/5,787.80 = 1,085.01/x
  3. Step 3: Cross multiply
    3,858.31x = 5,787.80 × 1,085.01
  4. Step 4: Simplify right side
    3,858.31x = 6,279,820.88
  5. Step 5: Solve for x
    x = 6,279,820.88/3,858.31
  6. Step 6: Final answer
    x = 1,627.61

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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.