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Finding the Fourth Proportional to 394,525,066.70, 553,544,416.90 and 394,525,066.70

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Solution

The fourth proportional to 394,525,066.70, 553,544,416.90 and 394,525,066.70 is: 553,544,416.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,525,066.70 : 553,544,416.90 = 394,525,066.70 : x
  2. Step 2: Convert to fraction form
    394,525,066.70/553,544,416.90 = 394,525,066.70/x
  3. Step 3: Cross multiply
    394,525,066.70x = 553,544,416.90 × 394,525,066.70
  4. Step 4: Simplify right side
    394,525,066.70x = 218,387,147,998,885,088
  5. Step 5: Solve for x
    x = 218,387,147,998,885,088/394,525,066.70
  6. Step 6: Final answer
    x = 553,544,416.90

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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.