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Finding the Fourth Proportional to 697,070.98, 961,958.45 and 391,105.14

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Solution

The fourth proportional to 697,070.98, 961,958.45 and 391,105.14 is: 539,725.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    697,070.98 : 961,958.45 = 391,105.14 : x
  2. Step 2: Convert to fraction form
    697,070.98/961,958.45 = 391,105.14/x
  3. Step 3: Cross multiply
    697,070.98x = 961,958.45 × 391,105.14
  4. Step 4: Simplify right side
    697,070.98x = 376,226,894,261.43
  5. Step 5: Solve for x
    x = 376,226,894,261.43/697,070.98
  6. Step 6: Final answer
    x = 539,725.37

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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.