Home / 3,845.75-5,768.78-1,072.40

Finding the Fourth Proportional to 3,845.75, 5,768.78 and 1,072.40

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Solution

The fourth proportional to 3,845.75, 5,768.78 and 1,072.40 is: 1,608.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,845.75 : 5,768.78 = 1,072.40 : x
  2. Step 2: Convert to fraction form
    3,845.75/5,768.78 = 1,072.40/x
  3. Step 3: Cross multiply
    3,845.75x = 5,768.78 × 1,072.40
  4. Step 4: Simplify right side
    3,845.75x = 6,186,405.47
  5. Step 5: Solve for x
    x = 6,186,405.47/3,845.75
  6. Step 6: Final answer
    x = 1,608.64

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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.