Home / 3,918.44-5,877.68-1,321.40

Finding the Fourth Proportional to 3,918.44, 5,877.68 and 1,321.40

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Solution

The fourth proportional to 3,918.44, 5,877.68 and 1,321.40 is: 1,982.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.44 : 5,877.68 = 1,321.40 : x
  2. Step 2: Convert to fraction form
    3,918.44/5,877.68 = 1,321.40/x
  3. Step 3: Cross multiply
    3,918.44x = 5,877.68 × 1,321.40
  4. Step 4: Simplify right side
    3,918.44x = 7,766,766.35
  5. Step 5: Solve for x
    x = 7,766,766.35/3,918.44
  6. Step 6: Final answer
    x = 1,982.11

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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.