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Finding the Fourth Proportional to 297.25, 445.98 and 123.87

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Solution

The fourth proportional to 297.25, 445.98 and 123.87 is: 185.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.25 : 445.98 = 123.87 : x
  2. Step 2: Convert to fraction form
    297.25/445.98 = 123.87/x
  3. Step 3: Cross multiply
    297.25x = 445.98 × 123.87
  4. Step 4: Simplify right side
    297.25x = 55,243.54
  5. Step 5: Solve for x
    x = 55,243.54/297.25
  6. Step 6: Final answer
    x = 185.85

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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.