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Finding the Fourth Proportional to 645,936.40, 968,904.60 and 505,814.80

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Solution

The fourth proportional to 645,936.40, 968,904.60 and 505,814.80 is: 758,722.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,936.40 : 968,904.60 = 505,814.80 : x
  2. Step 2: Convert to fraction form
    645,936.40/968,904.60 = 505,814.80/x
  3. Step 3: Cross multiply
    645,936.40x = 968,904.60 × 505,814.80
  4. Step 4: Simplify right side
    645,936.40x = 490,086,286,468.08
  5. Step 5: Solve for x
    x = 490,086,286,468.08/645,936.40
  6. Step 6: Final answer
    x = 758,722.20

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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.