Home / 3,858.36-5,787.60-1,393.20

Finding the Fourth Proportional to 3,858.36, 5,787.60 and 1,393.20

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Solution

The fourth proportional to 3,858.36, 5,787.60 and 1,393.20 is: 2,089.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,858.36 : 5,787.60 = 1,393.20 : x
  2. Step 2: Convert to fraction form
    3,858.36/5,787.60 = 1,393.20/x
  3. Step 3: Cross multiply
    3,858.36x = 5,787.60 × 1,393.20
  4. Step 4: Simplify right side
    3,858.36x = 8,063,284.32
  5. Step 5: Solve for x
    x = 8,063,284.32/3,858.36
  6. Step 6: Final answer
    x = 2,089.82

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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.