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Finding the Fourth Proportional to 445.55, 668.34 and 120.96

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Solution

The fourth proportional to 445.55, 668.34 and 120.96 is: 181.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.55 : 668.34 = 120.96 : x
  2. Step 2: Convert to fraction form
    445.55/668.34 = 120.96/x
  3. Step 3: Cross multiply
    445.55x = 668.34 × 120.96
  4. Step 4: Simplify right side
    445.55x = 80,842.41
  5. Step 5: Solve for x
    x = 80,842.41/445.55
  6. Step 6: Final answer
    x = 181.45

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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.