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Finding the Fourth Proportional to 5,245.49, 7,238.81 and 2,855.48

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Solution

The fourth proportional to 5,245.49, 7,238.81 and 2,855.48 is: 3,940.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,245.49 : 7,238.81 = 2,855.48 : x
  2. Step 2: Convert to fraction form
    5,245.49/7,238.81 = 2,855.48/x
  3. Step 3: Cross multiply
    5,245.49x = 7,238.81 × 2,855.48
  4. Step 4: Simplify right side
    5,245.49x = 20,670,281.00
  5. Step 5: Solve for x
    x = 20,670,281.00/5,245.49
  6. Step 6: Final answer
    x = 3,940.58

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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.