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Finding the Fourth Proportional to 393,303,612.80, 589,955,419.20 and 354,336,521.60

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Solution

The fourth proportional to 393,303,612.80, 589,955,419.20 and 354,336,521.60 is: 531,504,782.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,303,612.80 : 589,955,419.20 = 354,336,521.60 : x
  2. Step 2: Convert to fraction form
    393,303,612.80/589,955,419.20 = 354,336,521.60/x
  3. Step 3: Cross multiply
    393,303,612.80x = 589,955,419.20 × 354,336,521.60
  4. Step 4: Simplify right side
    393,303,612.80x = 209,042,751,138,397,888
  5. Step 5: Solve for x
    x = 209,042,751,138,397,888/393,303,612.80
  6. Step 6: Final answer
    x = 531,504,782.40

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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.