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Finding the Fourth Proportional to 1,387,798, 1,915,161.24 and 751,894

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Solution

The fourth proportional to 1,387,798, 1,915,161.24 and 751,894 is: 1,037,613.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,798 : 1,915,161.24 = 751,894 : x
  2. Step 2: Convert to fraction form
    1,387,798/1,915,161.24 = 751,894/x
  3. Step 3: Cross multiply
    1,387,798x = 1,915,161.24 × 751,894
  4. Step 4: Simplify right side
    1,387,798x = 1,439,998,245,388.56
  5. Step 5: Solve for x
    x = 1,439,998,245,388.56/1,387,798
  6. Step 6: Final answer
    x = 1,037,613.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.