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Finding the Fourth Proportional to 816,100, 1,126,351.56 and 679,918

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Solution

The fourth proportional to 816,100, 1,126,351.56 and 679,918 is: 938,398.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    816,100 : 1,126,351.56 = 679,918 : x
  2. Step 2: Convert to fraction form
    816,100/1,126,351.56 = 679,918/x
  3. Step 3: Cross multiply
    816,100x = 1,126,351.56 × 679,918
  4. Step 4: Simplify right side
    816,100x = 765,826,699,972.08
  5. Step 5: Solve for x
    x = 765,826,699,972.08/816,100
  6. Step 6: Final answer
    x = 938,398.11

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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.