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Finding the Fourth Proportional to 442.94, 664.44 and 118.31

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Solution

The fourth proportional to 442.94, 664.44 and 118.31 is: 177.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.94 : 664.44 = 118.31 : x
  2. Step 2: Convert to fraction form
    442.94/664.44 = 118.31/x
  3. Step 3: Cross multiply
    442.94x = 664.44 × 118.31
  4. Step 4: Simplify right side
    442.94x = 78,609.90
  5. Step 5: Solve for x
    x = 78,609.90/442.94
  6. Step 6: Final answer
    x = 177.47

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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.