Home / 419,922,812.80-629,884,219.20-394,413,644.80

Finding the Fourth Proportional to 419,922,812.80, 629,884,219.20 and 394,413,644.80

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Solution

The fourth proportional to 419,922,812.80, 629,884,219.20 and 394,413,644.80 is: 591,620,467.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,922,812.80 : 629,884,219.20 = 394,413,644.80 : x
  2. Step 2: Convert to fraction form
    419,922,812.80/629,884,219.20 = 394,413,644.80/x
  3. Step 3: Cross multiply
    419,922,812.80x = 629,884,219.20 × 394,413,644.80
  4. Step 4: Simplify right side
    419,922,812.80x = 248,434,930,696,674,176
  5. Step 5: Solve for x
    x = 248,434,930,696,674,176/419,922,812.80
  6. Step 6: Final answer
    x = 591,620,467.20

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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.