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Finding the Fourth Proportional to 647,213.60, 970,820.40 and 363,778.40

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Solution

The fourth proportional to 647,213.60, 970,820.40 and 363,778.40 is: 545,667.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,213.60 : 970,820.40 = 363,778.40 : x
  2. Step 2: Convert to fraction form
    647,213.60/970,820.40 = 363,778.40/x
  3. Step 3: Cross multiply
    647,213.60x = 970,820.40 × 363,778.40
  4. Step 4: Simplify right side
    647,213.60x = 353,163,491,799.36
  5. Step 5: Solve for x
    x = 353,163,491,799.36/647,213.60
  6. Step 6: Final answer
    x = 545,667.60

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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.