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Finding the Fourth Proportional to 662,561.20, 993,841.80 and 397,140.40

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Solution

The fourth proportional to 662,561.20, 993,841.80 and 397,140.40 is: 595,710.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,561.20 : 993,841.80 = 397,140.40 : x
  2. Step 2: Convert to fraction form
    662,561.20/993,841.80 = 397,140.40/x
  3. Step 3: Cross multiply
    662,561.20x = 993,841.80 × 397,140.40
  4. Step 4: Simplify right side
    662,561.20x = 394,694,729,988.72
  5. Step 5: Solve for x
    x = 394,694,729,988.72/662,561.20
  6. Step 6: Final answer
    x = 595,710.60

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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.