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Finding the Fourth Proportional to 621,804.60, 932,706.90 and 411,679.80

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Solution

The fourth proportional to 621,804.60, 932,706.90 and 411,679.80 is: 617,519.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,804.60 : 932,706.90 = 411,679.80 : x
  2. Step 2: Convert to fraction form
    621,804.60/932,706.90 = 411,679.80/x
  3. Step 3: Cross multiply
    621,804.60x = 932,706.90 × 411,679.80
  4. Step 4: Simplify right side
    621,804.60x = 383,976,590,050.62
  5. Step 5: Solve for x
    x = 383,976,590,050.62/621,804.60
  6. Step 6: Final answer
    x = 617,519.70

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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.