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Finding the Fourth Proportional to 481.63, 664.98 and 316.13

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Solution

The fourth proportional to 481.63, 664.98 and 316.13 is: 436.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.63 : 664.98 = 316.13 : x
  2. Step 2: Convert to fraction form
    481.63/664.98 = 316.13/x
  3. Step 3: Cross multiply
    481.63x = 664.98 × 316.13
  4. Step 4: Simplify right side
    481.63x = 210,219.69
  5. Step 5: Solve for x
    x = 210,219.69/481.63
  6. Step 6: Final answer
    x = 436.47

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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.