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Finding the Fourth Proportional to 442.56, 663.90 and 186

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Solution

The fourth proportional to 442.56, 663.90 and 186 is: 279.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.56 : 663.90 = 186 : x
  2. Step 2: Convert to fraction form
    442.56/663.90 = 186/x
  3. Step 3: Cross multiply
    442.56x = 663.90 × 186
  4. Step 4: Simplify right side
    442.56x = 123,485.40
  5. Step 5: Solve for x
    x = 123,485.40/442.56
  6. Step 6: Final answer
    x = 279.03

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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.