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Finding the Fourth Proportional to 678,774.85, 936,654.65 and 392,313.49

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Solution

The fourth proportional to 678,774.85, 936,654.65 and 392,313.49 is: 541,361.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,774.85 : 936,654.65 = 392,313.49 : x
  2. Step 2: Convert to fraction form
    678,774.85/936,654.65 = 392,313.49/x
  3. Step 3: Cross multiply
    678,774.85x = 936,654.65 × 392,313.49
  4. Step 4: Simplify right side
    678,774.85x = 367,462,252,704.66
  5. Step 5: Solve for x
    x = 367,462,252,704.66/678,774.85
  6. Step 6: Final answer
    x = 541,361.03

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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.