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Finding the Fourth Proportional to 612,709.20, 919,092.60 and 191,998.80

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Solution

The fourth proportional to 612,709.20, 919,092.60 and 191,998.80 is: 288,007.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,709.20 : 919,092.60 = 191,998.80 : x
  2. Step 2: Convert to fraction form
    612,709.20/919,092.60 = 191,998.80/x
  3. Step 3: Cross multiply
    612,709.20x = 919,092.60 × 191,998.80
  4. Step 4: Simplify right side
    612,709.20x = 176,464,676,288.88
  5. Step 5: Solve for x
    x = 176,464,676,288.88/612,709.20
  6. Step 6: Final answer
    x = 288,007.22

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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.