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Finding the Fourth Proportional to 481.89, 665.19 and 316.25

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Solution

The fourth proportional to 481.89, 665.19 and 316.25 is: 436.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.89 : 665.19 = 316.25 : x
  2. Step 2: Convert to fraction form
    481.89/665.19 = 316.25/x
  3. Step 3: Cross multiply
    481.89x = 665.19 × 316.25
  4. Step 4: Simplify right side
    481.89x = 210,363.01
  5. Step 5: Solve for x
    x = 210,363.01/481.89
  6. Step 6: Final answer
    x = 436.54

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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.