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Finding the Fourth Proportional to 445.20, 667.44 and 171.15

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Solution

The fourth proportional to 445.20, 667.44 and 171.15 is: 256.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.20 : 667.44 = 171.15 : x
  2. Step 2: Convert to fraction form
    445.20/667.44 = 171.15/x
  3. Step 3: Cross multiply
    445.20x = 667.44 × 171.15
  4. Step 4: Simplify right side
    445.20x = 114,232.36
  5. Step 5: Solve for x
    x = 114,232.36/445.20
  6. Step 6: Final answer
    x = 256.59

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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.