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Finding the Fourth Proportional to 862,213.86, 1,189,855.50 and 499,847.80

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Solution

The fourth proportional to 862,213.86, 1,189,855.50 and 499,847.80 is: 689,790.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    862,213.86 : 1,189,855.50 = 499,847.80 : x
  2. Step 2: Convert to fraction form
    862,213.86/1,189,855.50 = 499,847.80/x
  3. Step 3: Cross multiply
    862,213.86x = 1,189,855.50 × 499,847.80
  4. Step 4: Simplify right side
    862,213.86x = 594,746,653,992.90
  5. Step 5: Solve for x
    x = 594,746,653,992.90/862,213.86
  6. Step 6: Final answer
    x = 689,790.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.