Home / 3,412.78-5,121.60-1,855.96

Finding the Fourth Proportional to 3,412.78, 5,121.60 and 1,855.96

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Solution

The fourth proportional to 3,412.78, 5,121.60 and 1,855.96 is: 2,785.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,412.78 : 5,121.60 = 1,855.96 : x
  2. Step 2: Convert to fraction form
    3,412.78/5,121.60 = 1,855.96/x
  3. Step 3: Cross multiply
    3,412.78x = 5,121.60 × 1,855.96
  4. Step 4: Simplify right side
    3,412.78x = 9,505,484.74
  5. Step 5: Solve for x
    x = 9,505,484.74/3,412.78
  6. Step 6: Final answer
    x = 2,785.26

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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.