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Finding the Fourth Proportional to 668,905.70, 923,087.07 and 362,979.90

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Solution

The fourth proportional to 668,905.70, 923,087.07 and 362,979.90 is: 500,910.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,905.70 : 923,087.07 = 362,979.90 : x
  2. Step 2: Convert to fraction form
    668,905.70/923,087.07 = 362,979.90/x
  3. Step 3: Cross multiply
    668,905.70x = 923,087.07 × 362,979.90
  4. Step 4: Simplify right side
    668,905.70x = 335,062,052,359.89
  5. Step 5: Solve for x
    x = 335,062,052,359.89/668,905.70
  6. Step 6: Final answer
    x = 500,910.75

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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.