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Finding the Fourth Proportional to 443.78, 664.00 and 307.09

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Solution

The fourth proportional to 443.78, 664.00 and 307.09 is: 459.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.78 : 664.00 = 307.09 : x
  2. Step 2: Convert to fraction form
    443.78/664.00 = 307.09/x
  3. Step 3: Cross multiply
    443.78x = 664.00 × 307.09
  4. Step 4: Simplify right side
    443.78x = 203,907.82
  5. Step 5: Solve for x
    x = 203,907.82/443.78
  6. Step 6: Final answer
    x = 459.48

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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.