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Finding the Fourth Proportional to 443.90, 666.12 and 200.45

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Solution

The fourth proportional to 443.90, 666.12 and 200.45 is: 300.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.90 : 666.12 = 200.45 : x
  2. Step 2: Convert to fraction form
    443.90/666.12 = 200.45/x
  3. Step 3: Cross multiply
    443.90x = 666.12 × 200.45
  4. Step 4: Simplify right side
    443.90x = 133,523.75
  5. Step 5: Solve for x
    x = 133,523.75/443.90
  6. Step 6: Final answer
    x = 300.80

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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.