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Finding the Fourth Proportional to 1,207,367.22, 1,811,105.78 and 853,958.82

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Solution

The fourth proportional to 1,207,367.22, 1,811,105.78 and 853,958.82 is: 1,280,977.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207,367.22 : 1,811,105.78 = 853,958.82 : x
  2. Step 2: Convert to fraction form
    1,207,367.22/1,811,105.78 = 853,958.82/x
  3. Step 3: Cross multiply
    1,207,367.22x = 1,811,105.78 × 853,958.82
  4. Step 4: Simplify right side
    1,207,367.22x = 1,546,609,750,514.19
  5. Step 5: Solve for x
    x = 1,546,609,750,514.19/1,207,367.22
  6. Step 6: Final answer
    x = 1,280,977.09

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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.