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Finding the Fourth Proportional to 697,789.90, 962,946.41 and 391,879.17

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Solution

The fourth proportional to 697,789.90, 962,946.41 and 391,879.17 is: 540,791.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    697,789.90 : 962,946.41 = 391,879.17 : x
  2. Step 2: Convert to fraction form
    697,789.90/962,946.41 = 391,879.17/x
  3. Step 3: Cross multiply
    697,789.90x = 962,946.41 × 391,879.17
  4. Step 4: Simplify right side
    697,789.90x = 377,358,643,292.34
  5. Step 5: Solve for x
    x = 377,358,643,292.34/697,789.90
  6. Step 6: Final answer
    x = 540,791.21

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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.