Home / 3,813.20-5,720.20-1,215.54

Finding the Fourth Proportional to 3,813.20, 5,720.20 and 1,215.54

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Solution

The fourth proportional to 3,813.20, 5,720.20 and 1,215.54 is: 1,823.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,813.20 : 5,720.20 = 1,215.54 : x
  2. Step 2: Convert to fraction form
    3,813.20/5,720.20 = 1,215.54/x
  3. Step 3: Cross multiply
    3,813.20x = 5,720.20 × 1,215.54
  4. Step 4: Simplify right side
    3,813.20x = 6,953,131.91
  5. Step 5: Solve for x
    x = 6,953,131.91/3,813.20
  6. Step 6: Final answer
    x = 1,823.44

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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.