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Finding the Fourth Proportional to 211,770,940.80, 317,656,411.20 and 211,770,940.80

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Solution

The fourth proportional to 211,770,940.80, 317,656,411.20 and 211,770,940.80 is: 317,656,411.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,770,940.80 : 317,656,411.20 = 211,770,940.80 : x
  2. Step 2: Convert to fraction form
    211,770,940.80/317,656,411.20 = 211,770,940.80/x
  3. Step 3: Cross multiply
    211,770,940.80x = 317,656,411.20 × 211,770,940.80
  4. Step 4: Simplify right side
    211,770,940.80x = 67,270,397,050,975,656
  5. Step 5: Solve for x
    x = 67,270,397,050,975,656/211,770,940.80
  6. Step 6: Final answer
    x = 317,656,411.20

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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.