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Finding the Fourth Proportional to 357, 535.20 and 140.44

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Solution

The fourth proportional to 357, 535.20 and 140.44 is: 210.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    357 : 535.20 = 140.44 : x
  2. Step 2: Convert to fraction form
    357/535.20 = 140.44/x
  3. Step 3: Cross multiply
    357x = 535.20 × 140.44
  4. Step 4: Simplify right side
    357x = 75,163.49
  5. Step 5: Solve for x
    x = 75,163.49/357
  6. Step 6: Final answer
    x = 210.54

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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.