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Finding the Fourth Proportional to 628.24, 940.80 and 367.55

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Solution

The fourth proportional to 628.24, 940.80 and 367.55 is: 550.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.24 : 940.80 = 367.55 : x
  2. Step 2: Convert to fraction form
    628.24/940.80 = 367.55/x
  3. Step 3: Cross multiply
    628.24x = 940.80 × 367.55
  4. Step 4: Simplify right side
    628.24x = 345,791.04
  5. Step 5: Solve for x
    x = 345,791.04/628.24
  6. Step 6: Final answer
    x = 550.42

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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.