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Finding the Fourth Proportional to 621,593.12, 932,389.68 and 411,181.85

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Solution

The fourth proportional to 621,593.12, 932,389.68 and 411,181.85 is: 616,772.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,593.12 : 932,389.68 = 411,181.85 : x
  2. Step 2: Convert to fraction form
    621,593.12/932,389.68 = 411,181.85/x
  3. Step 3: Cross multiply
    621,593.12x = 932,389.68 × 411,181.85
  4. Step 4: Simplify right side
    621,593.12x = 383,381,717,416.21
  5. Step 5: Solve for x
    x = 383,381,717,416.21/621,593.12
  6. Step 6: Final answer
    x = 616,772.78

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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.