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Finding the Fourth Proportional to 535.48, 739.22 and 378.44

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Solution

The fourth proportional to 535.48, 739.22 and 378.44 is: 522.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.48 : 739.22 = 378.44 : x
  2. Step 2: Convert to fraction form
    535.48/739.22 = 378.44/x
  3. Step 3: Cross multiply
    535.48x = 739.22 × 378.44
  4. Step 4: Simplify right side
    535.48x = 279,750.42
  5. Step 5: Solve for x
    x = 279,750.42/535.48
  6. Step 6: Final answer
    x = 522.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.