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Finding the Fourth Proportional to 697,098.76, 961,993.56 and 391,174.42

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Solution

The fourth proportional to 697,098.76, 961,993.56 and 391,174.42 is: 539,819.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    697,098.76 : 961,993.56 = 391,174.42 : x
  2. Step 2: Convert to fraction form
    697,098.76/961,993.56 = 391,174.42/x
  3. Step 3: Cross multiply
    697,098.76x = 961,993.56 × 391,174.42
  4. Step 4: Simplify right side
    697,098.76x = 376,307,272,876.74
  5. Step 5: Solve for x
    x = 376,307,272,876.74/697,098.76
  6. Step 6: Final answer
    x = 539,819.17

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Double scale
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1.5x scale

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.