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Finding the Fourth Proportional to 442.64, 664.04 and 186.12

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Solution

The fourth proportional to 442.64, 664.04 and 186.12 is: 279.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.64 : 664.04 = 186.12 : x
  2. Step 2: Convert to fraction form
    442.64/664.04 = 186.12/x
  3. Step 3: Cross multiply
    442.64x = 664.04 × 186.12
  4. Step 4: Simplify right side
    442.64x = 123,591.12
  5. Step 5: Solve for x
    x = 123,591.12/442.64
  6. Step 6: Final answer
    x = 279.21

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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.