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Finding the Fourth Proportional to 664,713.20, 997,069.80 and 191,446.40

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Solution

The fourth proportional to 664,713.20, 997,069.80 and 191,446.40 is: 287,169.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,713.20 : 997,069.80 = 191,446.40 : x
  2. Step 2: Convert to fraction form
    664,713.20/997,069.80 = 191,446.40/x
  3. Step 3: Cross multiply
    664,713.20x = 997,069.80 × 191,446.40
  4. Step 4: Simplify right side
    664,713.20x = 190,885,423,758.72
  5. Step 5: Solve for x
    x = 190,885,423,758.72/664,713.20
  6. Step 6: Final answer
    x = 287,169.60

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Double scale
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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.