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Finding the Fourth Proportional to 678,865, 936,862.88 and 377,059

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Solution

The fourth proportional to 678,865, 936,862.88 and 377,059 is: 520,357.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,865 : 936,862.88 = 377,059 : x
  2. Step 2: Convert to fraction form
    678,865/936,862.88 = 377,059/x
  3. Step 3: Cross multiply
    678,865x = 936,862.88 × 377,059
  4. Step 4: Simplify right side
    678,865x = 353,252,580,669.92
  5. Step 5: Solve for x
    x = 353,252,580,669.92/678,865
  6. Step 6: Final answer
    x = 520,357.63

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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.