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Finding the Fourth Proportional to 443.53, 665.27 and 118.90

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Solution

The fourth proportional to 443.53, 665.27 and 118.90 is: 178.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.53 : 665.27 = 118.90 : x
  2. Step 2: Convert to fraction form
    443.53/665.27 = 118.90/x
  3. Step 3: Cross multiply
    443.53x = 665.27 × 118.90
  4. Step 4: Simplify right side
    443.53x = 79,096.68
  5. Step 5: Solve for x
    x = 79,096.68/443.53
  6. Step 6: Final answer
    x = 178.34

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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.