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Finding the Fourth Proportional to 678,608.01, 936,594.27 and 392,294.07

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Solution

The fourth proportional to 678,608.01, 936,594.27 and 392,294.07 is: 541,432.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,608.01 : 936,594.27 = 392,294.07 : x
  2. Step 2: Convert to fraction form
    678,608.01/936,594.27 = 392,294.07/x
  3. Step 3: Cross multiply
    678,608.01x = 936,594.27 × 392,294.07
  4. Step 4: Simplify right side
    678,608.01x = 367,420,378,116.98
  5. Step 5: Solve for x
    x = 367,420,378,116.98/678,608.01
  6. Step 6: Final answer
    x = 541,432.42

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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.