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Finding the Fourth Proportional to 998.99, 1,496.22 and 479.38

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Solution

The fourth proportional to 998.99, 1,496.22 and 479.38 is: 717.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    998.99 : 1,496.22 = 479.38 : x
  2. Step 2: Convert to fraction form
    998.99/1,496.22 = 479.38/x
  3. Step 3: Cross multiply
    998.99x = 1,496.22 × 479.38
  4. Step 4: Simplify right side
    998.99x = 717,253.70
  5. Step 5: Solve for x
    x = 717,253.70/998.99
  6. Step 6: Final answer
    x = 717.98

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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.