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Finding the Fourth Proportional to 720.95, 995.18 and 481.73

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Solution

The fourth proportional to 720.95, 995.18 and 481.73 is: 664.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.95 : 995.18 = 481.73 : x
  2. Step 2: Convert to fraction form
    720.95/995.18 = 481.73/x
  3. Step 3: Cross multiply
    720.95x = 995.18 × 481.73
  4. Step 4: Simplify right side
    720.95x = 479,405.65
  5. Step 5: Solve for x
    x = 479,405.65/720.95
  6. Step 6: Final answer
    x = 664.96

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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.