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Finding the Fourth Proportional to 456.44, 685.14 and 196.56

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Solution

The fourth proportional to 456.44, 685.14 and 196.56 is: 295.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.44 : 685.14 = 196.56 : x
  2. Step 2: Convert to fraction form
    456.44/685.14 = 196.56/x
  3. Step 3: Cross multiply
    456.44x = 685.14 × 196.56
  4. Step 4: Simplify right side
    456.44x = 134,672.86
  5. Step 5: Solve for x
    x = 134,672.86/456.44
  6. Step 6: Final answer
    x = 295.05

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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.