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Finding the Fourth Proportional to 678,906.62, 936,920.79 and 377,100.62

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Solution

The fourth proportional to 678,906.62, 936,920.79 and 377,100.62 is: 520,415.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,906.62 : 936,920.79 = 377,100.62 : x
  2. Step 2: Convert to fraction form
    678,906.62/936,920.79 = 377,100.62/x
  3. Step 3: Cross multiply
    678,906.62x = 936,920.79 × 377,100.62
  4. Step 4: Simplify right side
    678,906.62x = 353,313,410,799.89
  5. Step 5: Solve for x
    x = 353,313,410,799.89/678,906.62
  6. Step 6: Final answer
    x = 520,415.33

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1.5x scale

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.