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Finding the Fourth Proportional to 627,645.20, 866,348.52 and 401,291.60

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Solution

The fourth proportional to 627,645.20, 866,348.52 and 401,291.60 is: 553,909.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,645.20 : 866,348.52 = 401,291.60 : x
  2. Step 2: Convert to fraction form
    627,645.20/866,348.52 = 401,291.60/x
  3. Step 3: Cross multiply
    627,645.20x = 866,348.52 × 401,291.60
  4. Step 4: Simplify right side
    627,645.20x = 347,658,383,748.43
  5. Step 5: Solve for x
    x = 347,658,383,748.43/627,645.20
  6. Step 6: Final answer
    x = 553,909.09

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Double scale
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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.