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Finding the Fourth Proportional to 818,673.40, 1,228,010.10 and 617,906.80

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Solution

The fourth proportional to 818,673.40, 1,228,010.10 and 617,906.80 is: 926,860.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    818,673.40 : 1,228,010.10 = 617,906.80 : x
  2. Step 2: Convert to fraction form
    818,673.40/1,228,010.10 = 617,906.80/x
  3. Step 3: Cross multiply
    818,673.40x = 1,228,010.10 × 617,906.80
  4. Step 4: Simplify right side
    818,673.40x = 758,795,791,258.68
  5. Step 5: Solve for x
    x = 758,795,791,258.68/818,673.40
  6. Step 6: Final answer
    x = 926,860.20

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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.