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Finding the Fourth Proportional to 3,838.55, 5,763.90 and 2,805.80

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Solution

The fourth proportional to 3,838.55, 5,763.90 and 2,805.80 is: 4,213.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,838.55 : 5,763.90 = 2,805.80 : x
  2. Step 2: Convert to fraction form
    3,838.55/5,763.90 = 2,805.80/x
  3. Step 3: Cross multiply
    3,838.55x = 5,763.90 × 2,805.80
  4. Step 4: Simplify right side
    3,838.55x = 16,172,350.62
  5. Step 5: Solve for x
    x = 16,172,350.62/3,838.55
  6. Step 6: Final answer
    x = 4,213.14

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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.