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Finding the Fourth Proportional to 647,236.80, 970,855.20 and 619,934.40

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Solution

The fourth proportional to 647,236.80, 970,855.20 and 619,934.40 is: 929,901.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,236.80 : 970,855.20 = 619,934.40 : x
  2. Step 2: Convert to fraction form
    647,236.80/970,855.20 = 619,934.40/x
  3. Step 3: Cross multiply
    647,236.80x = 970,855.20 × 619,934.40
  4. Step 4: Simplify right side
    647,236.80x = 601,866,535,898.88
  5. Step 5: Solve for x
    x = 601,866,535,898.88/647,236.80
  6. Step 6: Final answer
    x = 929,901.60

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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.