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Finding the Fourth Proportional to 678,861, 936,857.34 and 377,055

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Solution

The fourth proportional to 678,861, 936,857.34 and 377,055 is: 520,352.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,861 : 936,857.34 = 377,055 : x
  2. Step 2: Convert to fraction form
    678,861/936,857.34 = 377,055/x
  3. Step 3: Cross multiply
    678,861x = 936,857.34 × 377,055
  4. Step 4: Simplify right side
    678,861x = 353,246,744,333.70
  5. Step 5: Solve for x
    x = 353,246,744,333.70/678,861
  6. Step 6: Final answer
    x = 520,352.10

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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.