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Finding the Fourth Proportional to 442.75, 664.15 and 118.12

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Solution

The fourth proportional to 442.75, 664.15 and 118.12 is: 177.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.75 : 664.15 = 118.12 : x
  2. Step 2: Convert to fraction form
    442.75/664.15 = 118.12/x
  3. Step 3: Cross multiply
    442.75x = 664.15 × 118.12
  4. Step 4: Simplify right side
    442.75x = 78,449.40
  5. Step 5: Solve for x
    x = 78,449.40/442.75
  6. Step 6: Final answer
    x = 177.19

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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.