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Finding the Fourth Proportional to 998.98, 1,499.03 and 414.42

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Solution

The fourth proportional to 998.98, 1,499.03 and 414.42 is: 621.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    998.98 : 1,499.03 = 414.42 : x
  2. Step 2: Convert to fraction form
    998.98/1,499.03 = 414.42/x
  3. Step 3: Cross multiply
    998.98x = 1,499.03 × 414.42
  4. Step 4: Simplify right side
    998.98x = 621,221.87
  5. Step 5: Solve for x
    x = 621,221.87/998.98
  6. Step 6: Final answer
    x = 621.86

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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.