Home / 3,820.78-5,729.28-1,355.23

Finding the Fourth Proportional to 3,820.78, 5,729.28 and 1,355.23

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Solution

The fourth proportional to 3,820.78, 5,729.28 and 1,355.23 is: 2,032.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,820.78 : 5,729.28 = 1,355.23 : x
  2. Step 2: Convert to fraction form
    3,820.78/5,729.28 = 1,355.23/x
  3. Step 3: Cross multiply
    3,820.78x = 5,729.28 × 1,355.23
  4. Step 4: Simplify right side
    3,820.78x = 7,764,511.54
  5. Step 5: Solve for x
    x = 7,764,511.54/3,820.78
  6. Step 6: Final answer
    x = 2,032.18

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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.