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Finding the Fourth Proportional to 481.89, 664.78 and 316.03

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Solution

The fourth proportional to 481.89, 664.78 and 316.03 is: 435.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.89 : 664.78 = 316.03 : x
  2. Step 2: Convert to fraction form
    481.89/664.78 = 316.03/x
  3. Step 3: Cross multiply
    481.89x = 664.78 × 316.03
  4. Step 4: Simplify right side
    481.89x = 210,090.42
  5. Step 5: Solve for x
    x = 210,090.42/481.89
  6. Step 6: Final answer
    x = 435.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.