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Finding the Fourth Proportional to 697,070.71, 961,879.51 and 391,083.44

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Solution

The fourth proportional to 697,070.71, 961,879.51 and 391,083.44 is: 539,651.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    697,070.71 : 961,879.51 = 391,083.44 : x
  2. Step 2: Convert to fraction form
    697,070.71/961,879.51 = 391,083.44/x
  3. Step 3: Cross multiply
    697,070.71x = 961,879.51 × 391,083.44
  4. Step 4: Simplify right side
    697,070.71x = 376,175,146,526.50
  5. Step 5: Solve for x
    x = 376,175,146,526.50/697,070.71
  6. Step 6: Final answer
    x = 539,651.34

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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.