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Finding the Fourth Proportional to 393,984,405.60, 590,976,608.40 and 388,609,634.40

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Solution

The fourth proportional to 393,984,405.60, 590,976,608.40 and 388,609,634.40 is: 582,914,451.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,984,405.60 : 590,976,608.40 = 388,609,634.40 : x
  2. Step 2: Convert to fraction form
    393,984,405.60/590,976,608.40 = 388,609,634.40/x
  3. Step 3: Cross multiply
    393,984,405.60x = 590,976,608.40 × 388,609,634.40
  4. Step 4: Simplify right side
    393,984,405.60x = 229,659,203,729,275,936
  5. Step 5: Solve for x
    x = 229,659,203,729,275,936/393,984,405.60
  6. Step 6: Final answer
    x = 582,914,451.60

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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.