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Finding the Fourth Proportional to 638.44, 955.77 and 349

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Solution

The fourth proportional to 638.44, 955.77 and 349 is: 522.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.44 : 955.77 = 349 : x
  2. Step 2: Convert to fraction form
    638.44/955.77 = 349/x
  3. Step 3: Cross multiply
    638.44x = 955.77 × 349
  4. Step 4: Simplify right side
    638.44x = 333,563.73
  5. Step 5: Solve for x
    x = 333,563.73/638.44
  6. Step 6: Final answer
    x = 522.47

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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.