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Finding the Fourth Proportional to 443.68, 665.21 and 238.04

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Solution

The fourth proportional to 443.68, 665.21 and 238.04 is: 356.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.68 : 665.21 = 238.04 : x
  2. Step 2: Convert to fraction form
    443.68/665.21 = 238.04/x
  3. Step 3: Cross multiply
    443.68x = 665.21 × 238.04
  4. Step 4: Simplify right side
    443.68x = 158,346.35
  5. Step 5: Solve for x
    x = 158,346.35/443.68
  6. Step 6: Final answer
    x = 356.90

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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.