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Finding the Fourth Proportional to 621,626.43, 932,439.78 and 411,215.16

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Solution

The fourth proportional to 621,626.43, 932,439.78 and 411,215.16 is: 616,822.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,626.43 : 932,439.78 = 411,215.16 : x
  2. Step 2: Convert to fraction form
    621,626.43/932,439.78 = 411,215.16/x
  3. Step 3: Cross multiply
    621,626.43x = 932,439.78 × 411,215.16
  4. Step 4: Simplify right side
    621,626.43x = 383,433,373,323.07
  5. Step 5: Solve for x
    x = 383,433,373,323.07/621,626.43
  6. Step 6: Final answer
    x = 616,822.83

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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.