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Finding the Fourth Proportional to 662,559.20, 993,838.80 and 397,138.40

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Solution

The fourth proportional to 662,559.20, 993,838.80 and 397,138.40 is: 595,707.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,559.20 : 993,838.80 = 397,138.40 : x
  2. Step 2: Convert to fraction form
    662,559.20/993,838.80 = 397,138.40/x
  3. Step 3: Cross multiply
    662,559.20x = 993,838.80 × 397,138.40
  4. Step 4: Simplify right side
    662,559.20x = 394,691,550,889.92
  5. Step 5: Solve for x
    x = 394,691,550,889.92/662,559.20
  6. Step 6: Final answer
    x = 595,707.60

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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.