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Finding the Fourth Proportional to 388,339,620.20, 582,509,430.30 and 235,954,903.40

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Solution

The fourth proportional to 388,339,620.20, 582,509,430.30 and 235,954,903.40 is: 353,932,355.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,339,620.20 : 582,509,430.30 = 235,954,903.40 : x
  2. Step 2: Convert to fraction form
    388,339,620.20/582,509,430.30 = 235,954,903.40/x
  3. Step 3: Cross multiply
    388,339,620.20x = 582,509,430.30 × 235,954,903.40
  4. Step 4: Simplify right side
    388,339,620.20x = 137,445,956,356,025,520
  5. Step 5: Solve for x
    x = 137,445,956,356,025,520/388,339,620.20
  6. Step 6: Final answer
    x = 353,932,355.10

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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.