Home / 3,870.21-5,805.73-1,236.80

Finding the Fourth Proportional to 3,870.21, 5,805.73 and 1,236.80

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Solution

The fourth proportional to 3,870.21, 5,805.73 and 1,236.80 is: 1,855.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,870.21 : 5,805.73 = 1,236.80 : x
  2. Step 2: Convert to fraction form
    3,870.21/5,805.73 = 1,236.80/x
  3. Step 3: Cross multiply
    3,870.21x = 5,805.73 × 1,236.80
  4. Step 4: Simplify right side
    3,870.21x = 7,180,497.84
  5. Step 5: Solve for x
    x = 7,180,497.84/3,870.21
  6. Step 6: Final answer
    x = 1,855.33

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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.