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Finding the Fourth Proportional to 612,856.40, 919,284.60 and 531,755.60

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Solution

The fourth proportional to 612,856.40, 919,284.60 and 531,755.60 is: 797,633.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,856.40 : 919,284.60 = 531,755.60 : x
  2. Step 2: Convert to fraction form
    612,856.40/919,284.60 = 531,755.60/x
  3. Step 3: Cross multiply
    612,856.40x = 919,284.60 × 531,755.60
  4. Step 4: Simplify right side
    612,856.40x = 488,834,734,043.76
  5. Step 5: Solve for x
    x = 488,834,734,043.76/612,856.40
  6. Step 6: Final answer
    x = 797,633.40

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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.