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Finding the Fourth Proportional to 1,268.03, 1,900.89 and 445.85

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Solution

The fourth proportional to 1,268.03, 1,900.89 and 445.85 is: 668.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.03 : 1,900.89 = 445.85 : x
  2. Step 2: Convert to fraction form
    1,268.03/1,900.89 = 445.85/x
  3. Step 3: Cross multiply
    1,268.03x = 1,900.89 × 445.85
  4. Step 4: Simplify right side
    1,268.03x = 847,511.81
  5. Step 5: Solve for x
    x = 847,511.81/1,268.03
  6. Step 6: Final answer
    x = 668.37

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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.