Home / 3,185.78-4,395.67-2,006.42

Finding the Fourth Proportional to 3,185.78, 4,395.67 and 2,006.42

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Solution

The fourth proportional to 3,185.78, 4,395.67 and 2,006.42 is: 2,768.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,185.78 : 4,395.67 = 2,006.42 : x
  2. Step 2: Convert to fraction form
    3,185.78/4,395.67 = 2,006.42/x
  3. Step 3: Cross multiply
    3,185.78x = 4,395.67 × 2,006.42
  4. Step 4: Simplify right side
    3,185.78x = 8,819,533.21
  5. Step 5: Solve for x
    x = 8,819,533.21/3,185.78
  6. Step 6: Final answer
    x = 2,768.41

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Half scale
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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.