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Finding the Fourth Proportional to 998.09, 1,497.20 and 727.41

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Solution

The fourth proportional to 998.09, 1,497.20 and 727.41 is: 1,091.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    998.09 : 1,497.20 = 727.41 : x
  2. Step 2: Convert to fraction form
    998.09/1,497.20 = 727.41/x
  3. Step 3: Cross multiply
    998.09x = 1,497.20 × 727.41
  4. Step 4: Simplify right side
    998.09x = 1,089,074.61
  5. Step 5: Solve for x
    x = 1,089,074.61/998.09
  6. Step 6: Final answer
    x = 1,091.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.