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Finding the Fourth Proportional to 1,289,199.80, 1,933,799.70 and 994,287.80

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Solution

The fourth proportional to 1,289,199.80, 1,933,799.70 and 994,287.80 is: 1,491,431.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289,199.80 : 1,933,799.70 = 994,287.80 : x
  2. Step 2: Convert to fraction form
    1,289,199.80/1,933,799.70 = 994,287.80/x
  3. Step 3: Cross multiply
    1,289,199.80x = 1,933,799.70 × 994,287.80
  4. Step 4: Simplify right side
    1,289,199.80x = 1,922,753,449,353.66
  5. Step 5: Solve for x
    x = 1,922,753,449,353.66/1,289,199.80
  6. Step 6: Final answer
    x = 1,491,431.70

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Similar ratio
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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.