Home / 3,918.66-5,408.01-2,739.30

Finding the Fourth Proportional to 3,918.66, 5,408.01 and 2,739.30

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Solution

The fourth proportional to 3,918.66, 5,408.01 and 2,739.30 is: 3,780.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.66 : 5,408.01 = 2,739.30 : x
  2. Step 2: Convert to fraction form
    3,918.66/5,408.01 = 2,739.30/x
  3. Step 3: Cross multiply
    3,918.66x = 5,408.01 × 2,739.30
  4. Step 4: Simplify right side
    3,918.66x = 14,814,161.79
  5. Step 5: Solve for x
    x = 14,814,161.79/3,918.66
  6. Step 6: Final answer
    x = 3,780.42

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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.