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Finding the Fourth Proportional to 442.75, 664.17 and 186.25

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Solution

The fourth proportional to 442.75, 664.17 and 186.25 is: 279.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.75 : 664.17 = 186.25 : x
  2. Step 2: Convert to fraction form
    442.75/664.17 = 186.25/x
  3. Step 3: Cross multiply
    442.75x = 664.17 × 186.25
  4. Step 4: Simplify right side
    442.75x = 123,701.66
  5. Step 5: Solve for x
    x = 123,701.66/442.75
  6. Step 6: Final answer
    x = 279.39

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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.