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Finding the Fourth Proportional to 664,809.20, 997,213.80 and 191,542.40

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Solution

The fourth proportional to 664,809.20, 997,213.80 and 191,542.40 is: 287,313.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,809.20 : 997,213.80 = 191,542.40 : x
  2. Step 2: Convert to fraction form
    664,809.20/997,213.80 = 191,542.40/x
  3. Step 3: Cross multiply
    664,809.20x = 997,213.80 × 191,542.40
  4. Step 4: Simplify right side
    664,809.20x = 191,008,724,565.12
  5. Step 5: Solve for x
    x = 191,008,724,565.12/664,809.20
  6. Step 6: Final answer
    x = 287,313.60

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Similar ratio
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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.