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Finding the Fourth Proportional to 450.78, 622.26 and 303.69

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Solution

The fourth proportional to 450.78, 622.26 and 303.69 is: 419.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.78 : 622.26 = 303.69 : x
  2. Step 2: Convert to fraction form
    450.78/622.26 = 303.69/x
  3. Step 3: Cross multiply
    450.78x = 622.26 × 303.69
  4. Step 4: Simplify right side
    450.78x = 188,974.14
  5. Step 5: Solve for x
    x = 188,974.14/450.78
  6. Step 6: Final answer
    x = 419.22

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.