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Finding the Fourth Proportional to 843.89, 1,266.51 and 433.31

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Solution

The fourth proportional to 843.89, 1,266.51 and 433.31 is: 650.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.89 : 1,266.51 = 433.31 : x
  2. Step 2: Convert to fraction form
    843.89/1,266.51 = 433.31/x
  3. Step 3: Cross multiply
    843.89x = 1,266.51 × 433.31
  4. Step 4: Simplify right side
    843.89x = 548,791.45
  5. Step 5: Solve for x
    x = 548,791.45/843.89
  6. Step 6: Final answer
    x = 650.31

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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.