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Finding the Fourth Proportional to 998.48, 1,498.44 and 413.52

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Solution

The fourth proportional to 998.48, 1,498.44 and 413.52 is: 620.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    998.48 : 1,498.44 = 413.52 : x
  2. Step 2: Convert to fraction form
    998.48/1,498.44 = 413.52/x
  3. Step 3: Cross multiply
    998.48x = 1,498.44 × 413.52
  4. Step 4: Simplify right side
    998.48x = 619,634.91
  5. Step 5: Solve for x
    x = 619,634.91/998.48
  6. Step 6: Final answer
    x = 620.58

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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.