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Finding the Fourth Proportional to 691,394,356.96, 954,066,533.97 and 389,963,057.65

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Solution

The fourth proportional to 691,394,356.96, 954,066,533.97 and 389,963,057.65 is: 538,116,487.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,394,356.96 : 954,066,533.97 = 389,963,057.65 : x
  2. Step 2: Convert to fraction form
    691,394,356.96/954,066,533.97 = 389,963,057.65/x
  3. Step 3: Cross multiply
    691,394,356.96x = 954,066,533.97 × 389,963,057.65
  4. Step 4: Simplify right side
    691,394,356.96x = 372,050,702,788,478,784
  5. Step 5: Solve for x
    x = 372,050,702,788,478,784/691,394,356.96
  6. Step 6: Final answer
    x = 538,116,487.42

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Double scale
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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.