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Finding the Fourth Proportional to 3,846.75, 5,769.45 and 1,381.65

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Solution

The fourth proportional to 3,846.75, 5,769.45 and 1,381.65 is: 2,072.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,846.75 : 5,769.45 = 1,381.65 : x
  2. Step 2: Convert to fraction form
    3,846.75/5,769.45 = 1,381.65/x
  3. Step 3: Cross multiply
    3,846.75x = 5,769.45 × 1,381.65
  4. Step 4: Simplify right side
    3,846.75x = 7,971,360.59
  5. Step 5: Solve for x
    x = 7,971,360.59/3,846.75
  6. Step 6: Final answer
    x = 2,072.23

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1.5x scale

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.