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Finding the Fourth Proportional to 3,986,227.60, 5,978,563.80 and 1,289,899.60

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Solution

The fourth proportional to 3,986,227.60, 5,978,563.80 and 1,289,899.60 is: 1,934,597.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,986,227.60 : 5,978,563.80 = 1,289,899.60 : x
  2. Step 2: Convert to fraction form
    3,986,227.60/5,978,563.80 = 1,289,899.60/x
  3. Step 3: Cross multiply
    3,986,227.60x = 5,978,563.80 × 1,289,899.60
  4. Step 4: Simplify right side
    3,986,227.60x = 7,711,747,054,194.48
  5. Step 5: Solve for x
    x = 7,711,747,054,194.48/3,986,227.60
  6. Step 6: Final answer
    x = 1,934,597.78

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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.