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Finding the Fourth Proportional to 320,387,051.20, 449,562,238.40 and 320,387,051.20

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Solution

The fourth proportional to 320,387,051.20, 449,562,238.40 and 320,387,051.20 is: 449,562,238.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,387,051.20 : 449,562,238.40 = 320,387,051.20 : x
  2. Step 2: Convert to fraction form
    320,387,051.20/449,562,238.40 = 320,387,051.20/x
  3. Step 3: Cross multiply
    320,387,051.20x = 449,562,238.40 × 320,387,051.20
  4. Step 4: Simplify right side
    320,387,051.20x = 144,033,919,891,847,392
  5. Step 5: Solve for x
    x = 144,033,919,891,847,392/320,387,051.20
  6. Step 6: Final answer
    x = 449,562,238.40

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.