Home / 1,321,040,514.30-1,981,560,771.45-400,915,376.70

Finding the Fourth Proportional to 1,321,040,514.30, 1,981,560,771.45 and 400,915,376.70

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Solution

The fourth proportional to 1,321,040,514.30, 1,981,560,771.45 and 400,915,376.70 is: 601,373,065.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321,040,514.30 : 1,981,560,771.45 = 400,915,376.70 : x
  2. Step 2: Convert to fraction form
    1,321,040,514.30/1,981,560,771.45 = 400,915,376.70/x
  3. Step 3: Cross multiply
    1,321,040,514.30x = 1,981,560,771.45 × 400,915,376.70
  4. Step 4: Simplify right side
    1,321,040,514.30x = 794,438,183,139,819,392
  5. Step 5: Solve for x
    x = 794,438,183,139,819,392/1,321,040,514.30
  6. Step 6: Final answer
    x = 601,373,065.05

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Double scale
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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.