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Finding the Fourth Proportional to 578,433.96, 866,520.99 and 398,487.60

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Solution

The fourth proportional to 578,433.96, 866,520.99 and 398,487.60 is: 596,952.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,433.96 : 866,520.99 = 398,487.60 : x
  2. Step 2: Convert to fraction form
    578,433.96/866,520.99 = 398,487.60/x
  3. Step 3: Cross multiply
    578,433.96x = 866,520.99 × 398,487.60
  4. Step 4: Simplify right side
    578,433.96x = 345,297,869,654.72
  5. Step 5: Solve for x
    x = 345,297,869,654.72/578,433.96
  6. Step 6: Final answer
    x = 596,952.97

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Double scale
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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.