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Finding the Fourth Proportional to 685,069.70, 961,197.10 and 685,069.70

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Solution

The fourth proportional to 685,069.70, 961,197.10 and 685,069.70 is: 961,197.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,069.70 : 961,197.10 = 685,069.70 : x
  2. Step 2: Convert to fraction form
    685,069.70/961,197.10 = 685,069.70/x
  3. Step 3: Cross multiply
    685,069.70x = 961,197.10 × 685,069.70
  4. Step 4: Simplify right side
    685,069.70x = 658,487,008,937.87
  5. Step 5: Solve for x
    x = 658,487,008,937.87/685,069.70
  6. Step 6: Final answer
    x = 961,197.10

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.