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Finding the Fourth Proportional to 408,893.64, 613,439.28 and 128,410.89

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Solution

The fourth proportional to 408,893.64, 613,439.28 and 128,410.89 is: 192,647.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,893.64 : 613,439.28 = 128,410.89 : x
  2. Step 2: Convert to fraction form
    408,893.64/613,439.28 = 128,410.89/x
  3. Step 3: Cross multiply
    408,893.64x = 613,439.28 × 128,410.89
  4. Step 4: Simplify right side
    408,893.64x = 78,772,283,905.76
  5. Step 5: Solve for x
    x = 78,772,283,905.76/408,893.64
  6. Step 6: Final answer
    x = 192,647.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.