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Finding the Fourth Proportional to 796.44, 1,193.91 and 431.26

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Solution

The fourth proportional to 796.44, 1,193.91 and 431.26 is: 646.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    796.44 : 1,193.91 = 431.26 : x
  2. Step 2: Convert to fraction form
    796.44/1,193.91 = 431.26/x
  3. Step 3: Cross multiply
    796.44x = 1,193.91 × 431.26
  4. Step 4: Simplify right side
    796.44x = 514,885.63
  5. Step 5: Solve for x
    x = 514,885.63/796.44
  6. Step 6: Final answer
    x = 646.48

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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.