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Finding the Fourth Proportional to 659,235.20, 987,540.60 and 343,869.80

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Solution

The fourth proportional to 659,235.20, 987,540.60 and 343,869.80 is: 515,120.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,235.20 : 987,540.60 = 343,869.80 : x
  2. Step 2: Convert to fraction form
    659,235.20/987,540.60 = 343,869.80/x
  3. Step 3: Cross multiply
    659,235.20x = 987,540.60 × 343,869.80
  4. Step 4: Simplify right side
    659,235.20x = 339,585,388,613.88
  5. Step 5: Solve for x
    x = 339,585,388,613.88/659,235.20
  6. Step 6: Final answer
    x = 515,120.23

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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.