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Finding the Fourth Proportional to 628.22, 941.42 and 445.98

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Solution

The fourth proportional to 628.22, 941.42 and 445.98 is: 668.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.22 : 941.42 = 445.98 : x
  2. Step 2: Convert to fraction form
    628.22/941.42 = 445.98/x
  3. Step 3: Cross multiply
    628.22x = 941.42 × 445.98
  4. Step 4: Simplify right side
    628.22x = 419,854.49
  5. Step 5: Solve for x
    x = 419,854.49/628.22
  6. Step 6: Final answer
    x = 668.32

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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.