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Finding the Fourth Proportional to 3,846.39, 5,766.12 and 1,380.63

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Solution

The fourth proportional to 3,846.39, 5,766.12 and 1,380.63 is: 2,069.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,846.39 : 5,766.12 = 1,380.63 : x
  2. Step 2: Convert to fraction form
    3,846.39/5,766.12 = 1,380.63/x
  3. Step 3: Cross multiply
    3,846.39x = 5,766.12 × 1,380.63
  4. Step 4: Simplify right side
    3,846.39x = 7,960,878.26
  5. Step 5: Solve for x
    x = 7,960,878.26/3,846.39
  6. Step 6: Final answer
    x = 2,069.70

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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.