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Finding the Fourth Proportional to 1,896.80, 2,845.53 and 664.11

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Solution

The fourth proportional to 1,896.80, 2,845.53 and 664.11 is: 996.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,896.80 : 2,845.53 = 664.11 : x
  2. Step 2: Convert to fraction form
    1,896.80/2,845.53 = 664.11/x
  3. Step 3: Cross multiply
    1,896.80x = 2,845.53 × 664.11
  4. Step 4: Simplify right side
    1,896.80x = 1,889,744.93
  5. Step 5: Solve for x
    x = 1,889,744.93/1,896.80
  6. Step 6: Final answer
    x = 996.28

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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.