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Finding the Fourth Proportional to 886,814.40, 1,330,221.60 and 512,644.80

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Solution

The fourth proportional to 886,814.40, 1,330,221.60 and 512,644.80 is: 768,967.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    886,814.40 : 1,330,221.60 = 512,644.80 : x
  2. Step 2: Convert to fraction form
    886,814.40/1,330,221.60 = 512,644.80/x
  3. Step 3: Cross multiply
    886,814.40x = 1,330,221.60 × 512,644.80
  4. Step 4: Simplify right side
    886,814.40x = 681,931,186,087.68
  5. Step 5: Solve for x
    x = 681,931,186,087.68/886,814.40
  6. Step 6: Final answer
    x = 768,967.20

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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.