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Finding the Fourth Proportional to 442.96, 664.42 and 134.80

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Solution

The fourth proportional to 442.96, 664.42 and 134.80 is: 202.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.96 : 664.42 = 134.80 : x
  2. Step 2: Convert to fraction form
    442.96/664.42 = 134.80/x
  3. Step 3: Cross multiply
    442.96x = 664.42 × 134.80
  4. Step 4: Simplify right side
    442.96x = 89,563.82
  5. Step 5: Solve for x
    x = 89,563.82/442.96
  6. Step 6: Final answer
    x = 202.19

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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.