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Finding the Fourth Proportional to 445.45, 668.31 and 171.57

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Solution

The fourth proportional to 445.45, 668.31 and 171.57 is: 257.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.45 : 668.31 = 171.57 : x
  2. Step 2: Convert to fraction form
    445.45/668.31 = 171.57/x
  3. Step 3: Cross multiply
    445.45x = 668.31 × 171.57
  4. Step 4: Simplify right side
    445.45x = 114,661.95
  5. Step 5: Solve for x
    x = 114,661.95/445.45
  6. Step 6: Final answer
    x = 257.41

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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.