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Finding the Fourth Proportional to 3,647.25, 5,033.21 and 1,991.25

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Solution

The fourth proportional to 3,647.25, 5,033.21 and 1,991.25 is: 2,747.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,647.25 : 5,033.21 = 1,991.25 : x
  2. Step 2: Convert to fraction form
    3,647.25/5,033.21 = 1,991.25/x
  3. Step 3: Cross multiply
    3,647.25x = 5,033.21 × 1,991.25
  4. Step 4: Simplify right side
    3,647.25x = 10,022,369.46
  5. Step 5: Solve for x
    x = 10,022,369.46/3,647.25
  6. Step 6: Final answer
    x = 2,747.93

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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.