Home / 419,904,891.20-629,857,336.80-389,293,889.60

Finding the Fourth Proportional to 419,904,891.20, 629,857,336.80 and 389,293,889.60

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Solution

The fourth proportional to 419,904,891.20, 629,857,336.80 and 389,293,889.60 is: 583,940,834.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,904,891.20 : 629,857,336.80 = 389,293,889.60 : x
  2. Step 2: Convert to fraction form
    419,904,891.20/629,857,336.80 = 389,293,889.60/x
  3. Step 3: Cross multiply
    419,904,891.20x = 629,857,336.80 × 389,293,889.60
  4. Step 4: Simplify right side
    419,904,891.20x = 245,199,612,535,969,216
  5. Step 5: Solve for x
    x = 245,199,612,535,969,216/419,904,891.20
  6. Step 6: Final answer
    x = 583,940,834.40

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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.