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Finding the Fourth Proportional to 443.34, 664.80 and 135.11

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Solution

The fourth proportional to 443.34, 664.80 and 135.11 is: 202.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.34 : 664.80 = 135.11 : x
  2. Step 2: Convert to fraction form
    443.34/664.80 = 135.11/x
  3. Step 3: Cross multiply
    443.34x = 664.80 × 135.11
  4. Step 4: Simplify right side
    443.34x = 89,817.80
  5. Step 5: Solve for x
    x = 89,817.80/443.34
  6. Step 6: Final answer
    x = 202.59

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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.