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Finding the Fourth Proportional to 647,560.20, 971,340.30 and 619,566.60

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Solution

The fourth proportional to 647,560.20, 971,340.30 and 619,566.60 is: 929,349.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,560.20 : 971,340.30 = 619,566.60 : x
  2. Step 2: Convert to fraction form
    647,560.20/971,340.30 = 619,566.60/x
  3. Step 3: Cross multiply
    647,560.20x = 971,340.30 × 619,566.60
  4. Step 4: Simplify right side
    647,560.20x = 601,810,007,113.98
  5. Step 5: Solve for x
    x = 601,810,007,113.98/647,560.20
  6. Step 6: Final answer
    x = 929,349.90

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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.