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Finding the Fourth Proportional to 628.62, 942.21 and 303.54

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Solution

The fourth proportional to 628.62, 942.21 and 303.54 is: 454.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.62 : 942.21 = 303.54 : x
  2. Step 2: Convert to fraction form
    628.62/942.21 = 303.54/x
  3. Step 3: Cross multiply
    628.62x = 942.21 × 303.54
  4. Step 4: Simplify right side
    628.62x = 285,998.42
  5. Step 5: Solve for x
    x = 285,998.42/628.62
  6. Step 6: Final answer
    x = 454.96

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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.