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Finding the Fourth Proportional to 210,384,612.20, 315,576,918.30 and 210,384,612.20

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Solution

The fourth proportional to 210,384,612.20, 315,576,918.30 and 210,384,612.20 is: 315,576,918.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,384,612.20 : 315,576,918.30 = 210,384,612.20 : x
  2. Step 2: Convert to fraction form
    210,384,612.20/315,576,918.30 = 210,384,612.20/x
  3. Step 3: Cross multiply
    210,384,612.20x = 315,576,918.30 × 210,384,612.20
  4. Step 4: Simplify right side
    210,384,612.20x = 66,392,527,575,816,584
  5. Step 5: Solve for x
    x = 66,392,527,575,816,584/210,384,612.20
  6. Step 6: Final answer
    x = 315,576,918.30

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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.