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Finding the Fourth Proportional to 443.93, 664.97 and 356.78

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Solution

The fourth proportional to 443.93, 664.97 and 356.78 is: 534.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.93 : 664.97 = 356.78 : x
  2. Step 2: Convert to fraction form
    443.93/664.97 = 356.78/x
  3. Step 3: Cross multiply
    443.93x = 664.97 × 356.78
  4. Step 4: Simplify right side
    443.93x = 237,242.89
  5. Step 5: Solve for x
    x = 237,242.89/443.93
  6. Step 6: Final answer
    x = 534.42

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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.