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Finding the Fourth Proportional to 859,481.60, 1,289,222.40 and 853,260.80

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Solution

The fourth proportional to 859,481.60, 1,289,222.40 and 853,260.80 is: 1,279,891.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,481.60 : 1,289,222.40 = 853,260.80 : x
  2. Step 2: Convert to fraction form
    859,481.60/1,289,222.40 = 853,260.80/x
  3. Step 3: Cross multiply
    859,481.60x = 1,289,222.40 × 853,260.80
  4. Step 4: Simplify right side
    859,481.60x = 1,100,042,936,401.92
  5. Step 5: Solve for x
    x = 1,100,042,936,401.92/859,481.60
  6. Step 6: Final answer
    x = 1,279,891.20

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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.