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Finding the Fourth Proportional to 481.26, 664.31 and 315.51

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Solution

The fourth proportional to 481.26, 664.31 and 315.51 is: 435.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.26 : 664.31 = 315.51 : x
  2. Step 2: Convert to fraction form
    481.26/664.31 = 315.51/x
  3. Step 3: Cross multiply
    481.26x = 664.31 × 315.51
  4. Step 4: Simplify right side
    481.26x = 209,597.24
  5. Step 5: Solve for x
    x = 209,597.24/481.26
  6. Step 6: Final answer
    x = 435.52

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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.