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Finding the Fourth Proportional to 481.14, 664.14 and 315.48

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Solution

The fourth proportional to 481.14, 664.14 and 315.48 is: 435.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.14 : 664.14 = 315.48 : x
  2. Step 2: Convert to fraction form
    481.14/664.14 = 315.48/x
  3. Step 3: Cross multiply
    481.14x = 664.14 × 315.48
  4. Step 4: Simplify right side
    481.14x = 209,522.89
  5. Step 5: Solve for x
    x = 209,522.89/481.14
  6. Step 6: Final answer
    x = 435.47

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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.