Home / 811,299.80-1,216,949.70-496,112.60

Finding the Fourth Proportional to 811,299.80, 1,216,949.70 and 496,112.60

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Solution

The fourth proportional to 811,299.80, 1,216,949.70 and 496,112.60 is: 744,168.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,299.80 : 1,216,949.70 = 496,112.60 : x
  2. Step 2: Convert to fraction form
    811,299.80/1,216,949.70 = 496,112.60/x
  3. Step 3: Cross multiply
    811,299.80x = 1,216,949.70 × 496,112.60
  4. Step 4: Simplify right side
    811,299.80x = 603,744,079,736.22
  5. Step 5: Solve for x
    x = 603,744,079,736.22/811,299.80
  6. Step 6: Final answer
    x = 744,168.90

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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.