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Finding the Fourth Proportional to 998.54, 1,497.73 and 413.39

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Solution

The fourth proportional to 998.54, 1,497.73 and 413.39 is: 620.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    998.54 : 1,497.73 = 413.39 : x
  2. Step 2: Convert to fraction form
    998.54/1,497.73 = 413.39/x
  3. Step 3: Cross multiply
    998.54x = 1,497.73 × 413.39
  4. Step 4: Simplify right side
    998.54x = 619,149.32
  5. Step 5: Solve for x
    x = 619,149.32/998.54
  6. Step 6: Final answer
    x = 620.05

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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.