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Finding the Fourth Proportional to 678,334.80, 936,105.64 and 423,833.60

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Solution

The fourth proportional to 678,334.80, 936,105.64 and 423,833.60 is: 584,892.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,334.80 : 936,105.64 = 423,833.60 : x
  2. Step 2: Convert to fraction form
    678,334.80/936,105.64 = 423,833.60/x
  3. Step 3: Cross multiply
    678,334.80x = 936,105.64 × 423,833.60
  4. Step 4: Simplify right side
    678,334.80x = 396,753,023,381.50
  5. Step 5: Solve for x
    x = 396,753,023,381.50/678,334.80
  6. Step 6: Final answer
    x = 584,892.63

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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.