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Finding the Fourth Proportional to 3,850.36, 5,310.78 and 3,721.78

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Solution

The fourth proportional to 3,850.36, 5,310.78 and 3,721.78 is: 5,133.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,850.36 : 5,310.78 = 3,721.78 : x
  2. Step 2: Convert to fraction form
    3,850.36/5,310.78 = 3,721.78/x
  3. Step 3: Cross multiply
    3,850.36x = 5,310.78 × 3,721.78
  4. Step 4: Simplify right side
    3,850.36x = 19,765,554.79
  5. Step 5: Solve for x
    x = 19,765,554.79/3,850.36
  6. Step 6: Final answer
    x = 5,133.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.