Home / 3,855.22-5,781.40-1,389.44

Finding the Fourth Proportional to 3,855.22, 5,781.40 and 1,389.44

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Solution

The fourth proportional to 3,855.22, 5,781.40 and 1,389.44 is: 2,083.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.22 : 5,781.40 = 1,389.44 : x
  2. Step 2: Convert to fraction form
    3,855.22/5,781.40 = 1,389.44/x
  3. Step 3: Cross multiply
    3,855.22x = 5,781.40 × 1,389.44
  4. Step 4: Simplify right side
    3,855.22x = 8,032,908.42
  5. Step 5: Solve for x
    x = 8,032,908.42/3,855.22
  6. Step 6: Final answer
    x = 2,083.64

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1.5x scale

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.