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Finding the Fourth Proportional to 628.75, 943.26 and 263.85

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Solution

The fourth proportional to 628.75, 943.26 and 263.85 is: 395.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.75 : 943.26 = 263.85 : x
  2. Step 2: Convert to fraction form
    628.75/943.26 = 263.85/x
  3. Step 3: Cross multiply
    628.75x = 943.26 × 263.85
  4. Step 4: Simplify right side
    628.75x = 248,879.15
  5. Step 5: Solve for x
    x = 248,879.15/628.75
  6. Step 6: Final answer
    x = 395.83

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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.