Home / 3,890.78-5,821.81-2,331.89

Finding the Fourth Proportional to 3,890.78, 5,821.81 and 2,331.89

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Solution

The fourth proportional to 3,890.78, 5,821.81 and 2,331.89 is: 3,489.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.78 : 5,821.81 = 2,331.89 : x
  2. Step 2: Convert to fraction form
    3,890.78/5,821.81 = 2,331.89/x
  3. Step 3: Cross multiply
    3,890.78x = 5,821.81 × 2,331.89
  4. Step 4: Simplify right side
    3,890.78x = 13,575,785.58
  5. Step 5: Solve for x
    x = 13,575,785.58/3,890.78
  6. Step 6: Final answer
    x = 3,489.22

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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.