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Finding the Fourth Proportional to 443.40, 665.42 and 200.13

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Solution

The fourth proportional to 443.40, 665.42 and 200.13 is: 300.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.40 : 665.42 = 200.13 : x
  2. Step 2: Convert to fraction form
    443.40/665.42 = 200.13/x
  3. Step 3: Cross multiply
    443.40x = 665.42 × 200.13
  4. Step 4: Simplify right side
    443.40x = 133,169.50
  5. Step 5: Solve for x
    x = 133,169.50/443.40
  6. Step 6: Final answer
    x = 300.34

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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.