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Finding the Third Proportional to 1,108,421.72 and 2,387,771.16

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Solution

The third proportional to 1,108,421.72 and 2,387,771.16 is: 5,143,756.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,108,421.72 : 2,387,771.16 = 2,387,771.16 : x
  2. Step 2: Convert to fraction form
    1,108,421.72/2,387,771.16 = 2,387,771.16/x
  3. Step 3: Cross multiply
    1,108,421.72x = 2,387,771.16 × 2,387,771.16
  4. Step 4: Simplify right side
    1,108,421.72x = 5,701,451,094,619.46
  5. Step 5: Solve for x
    x = 5,701,451,094,619.46/1,108,421.72
  6. Step 6: Final answer
    x = 5,143,756.21

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.