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Finding the Fourth Proportional to 807,679.60, 1,211,227.80 and 408,187.60

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Solution

The fourth proportional to 807,679.60, 1,211,227.80 and 408,187.60 is: 612,134.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,679.60 : 1,211,227.80 = 408,187.60 : x
  2. Step 2: Convert to fraction form
    807,679.60/1,211,227.80 = 408,187.60/x
  3. Step 3: Cross multiply
    807,679.60x = 1,211,227.80 × 408,187.60
  4. Step 4: Simplify right side
    807,679.60x = 494,408,168,735.28
  5. Step 5: Solve for x
    x = 494,408,168,735.28/807,679.60
  6. Step 6: Final answer
    x = 612,134.03

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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.