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Finding the Fourth Proportional to 659,211.20, 987,504.60 and 343,845.80

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Solution

The fourth proportional to 659,211.20, 987,504.60 and 343,845.80 is: 515,084.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,211.20 : 987,504.60 = 343,845.80 : x
  2. Step 2: Convert to fraction form
    659,211.20/987,504.60 = 343,845.80/x
  3. Step 3: Cross multiply
    659,211.20x = 987,504.60 × 343,845.80
  4. Step 4: Simplify right side
    659,211.20x = 339,549,309,190.68
  5. Step 5: Solve for x
    x = 339,549,309,190.68/659,211.20
  6. Step 6: Final answer
    x = 515,084.25

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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.