Home / 3,858.21-5,780.03-1,911.78

Finding the Fourth Proportional to 3,858.21, 5,780.03 and 1,911.78

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Solution

The fourth proportional to 3,858.21, 5,780.03 and 1,911.78 is: 2,864.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,858.21 : 5,780.03 = 1,911.78 : x
  2. Step 2: Convert to fraction form
    3,858.21/5,780.03 = 1,911.78/x
  3. Step 3: Cross multiply
    3,858.21x = 5,780.03 × 1,911.78
  4. Step 4: Simplify right side
    3,858.21x = 11,050,136.19
  5. Step 5: Solve for x
    x = 11,050,136.19/3,858.21
  6. Step 6: Final answer
    x = 2,864.06

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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.