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Finding the Fourth Proportional to 697,097.75, 961,992.18 and 391,173.42

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Solution

The fourth proportional to 697,097.75, 961,992.18 and 391,173.42 is: 539,817.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    697,097.75 : 961,992.18 = 391,173.42 : x
  2. Step 2: Convert to fraction form
    697,097.75/961,992.18 = 391,173.42/x
  3. Step 3: Cross multiply
    697,097.75x = 961,992.18 × 391,173.42
  4. Step 4: Simplify right side
    697,097.75x = 376,305,771,063.86
  5. Step 5: Solve for x
    x = 376,305,771,063.86/697,097.75
  6. Step 6: Final answer
    x = 539,817.80

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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.