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Finding the Fourth Proportional to 628.05, 942.09 and 423.03

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Solution

The fourth proportional to 628.05, 942.09 and 423.03 is: 634.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.05 : 942.09 = 423.03 : x
  2. Step 2: Convert to fraction form
    628.05/942.09 = 423.03/x
  3. Step 3: Cross multiply
    628.05x = 942.09 × 423.03
  4. Step 4: Simplify right side
    628.05x = 398,532.33
  5. Step 5: Solve for x
    x = 398,532.33/628.05
  6. Step 6: Final answer
    x = 634.56

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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.