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Finding the Fourth Proportional to 3,812.80, 5,266.80 and 3,069.64

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Solution

The fourth proportional to 3,812.80, 5,266.80 and 3,069.64 is: 4,240.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,812.80 : 5,266.80 = 3,069.64 : x
  2. Step 2: Convert to fraction form
    3,812.80/5,266.80 = 3,069.64/x
  3. Step 3: Cross multiply
    3,812.80x = 5,266.80 × 3,069.64
  4. Step 4: Simplify right side
    3,812.80x = 16,167,179.95
  5. Step 5: Solve for x
    x = 16,167,179.95/3,812.80
  6. Step 6: Final answer
    x = 4,240.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.