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Finding the Fourth Proportional to 393,983,998.65, 590,975,997.98 and 393,983,998.65

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Solution

The fourth proportional to 393,983,998.65, 590,975,997.98 and 393,983,998.65 is: 590,975,997.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,983,998.65 : 590,975,997.98 = 393,983,998.65 : x
  2. Step 2: Convert to fraction form
    393,983,998.65/590,975,997.98 = 393,983,998.65/x
  3. Step 3: Cross multiply
    393,983,998.65x = 590,975,997.98 × 393,983,998.65
  4. Step 4: Simplify right side
    393,983,998.65x = 232,835,086,788,364,800
  5. Step 5: Solve for x
    x = 232,835,086,788,364,800/393,983,998.65
  6. Step 6: Final answer
    x = 590,975,997.98

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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.