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Finding the Fourth Proportional to 678,583.76, 936,021.96 and 437,186

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Solution

The fourth proportional to 678,583.76, 936,021.96 and 437,186 is: 603,043.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,583.76 : 936,021.96 = 437,186 : x
  2. Step 2: Convert to fraction form
    678,583.76/936,021.96 = 437,186/x
  3. Step 3: Cross multiply
    678,583.76x = 936,021.96 × 437,186
  4. Step 4: Simplify right side
    678,583.76x = 409,215,696,604.56
  5. Step 5: Solve for x
    x = 409,215,696,604.56/678,583.76
  6. Step 6: Final answer
    x = 603,043.75

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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.