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Finding the Fourth Proportional to 628.56, 941.22 and 423.09

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Solution

The fourth proportional to 628.56, 941.22 and 423.09 is: 633.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.56 : 941.22 = 423.09 : x
  2. Step 2: Convert to fraction form
    628.56/941.22 = 423.09/x
  3. Step 3: Cross multiply
    628.56x = 941.22 × 423.09
  4. Step 4: Simplify right side
    628.56x = 398,220.77
  5. Step 5: Solve for x
    x = 398,220.77/628.56
  6. Step 6: Final answer
    x = 633.54

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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.