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Finding the Fourth Proportional to 662,990.60, 994,485.90 and 411,048.20

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Solution

The fourth proportional to 662,990.60, 994,485.90 and 411,048.20 is: 616,572.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,990.60 : 994,485.90 = 411,048.20 : x
  2. Step 2: Convert to fraction form
    662,990.60/994,485.90 = 411,048.20/x
  3. Step 3: Cross multiply
    662,990.60x = 994,485.90 × 411,048.20
  4. Step 4: Simplify right side
    662,990.60x = 408,781,639,120.38
  5. Step 5: Solve for x
    x = 408,781,639,120.38/662,990.60
  6. Step 6: Final answer
    x = 616,572.30

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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.