Home / 3,813.21-5,720.40-1,621.35

Finding the Fourth Proportional to 3,813.21, 5,720.40 and 1,621.35

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Solution

The fourth proportional to 3,813.21, 5,720.40 and 1,621.35 is: 2,432.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,813.21 : 5,720.40 = 1,621.35 : x
  2. Step 2: Convert to fraction form
    3,813.21/5,720.40 = 1,621.35/x
  3. Step 3: Cross multiply
    3,813.21x = 5,720.40 × 1,621.35
  4. Step 4: Simplify right side
    3,813.21x = 9,274,770.54
  5. Step 5: Solve for x
    x = 9,274,770.54/3,813.21
  6. Step 6: Final answer
    x = 2,432.27

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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.