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Finding the Fourth Proportional to 628.36, 941.75 and 445.80

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Solution

The fourth proportional to 628.36, 941.75 and 445.80 is: 668.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.36 : 941.75 = 445.80 : x
  2. Step 2: Convert to fraction form
    628.36/941.75 = 445.80/x
  3. Step 3: Cross multiply
    628.36x = 941.75 × 445.80
  4. Step 4: Simplify right side
    628.36x = 419,832.15
  5. Step 5: Solve for x
    x = 419,832.15/628.36
  6. Step 6: Final answer
    x = 668.14

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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.