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Finding the Fourth Proportional to 647,951.20, 971,926.80 and 411,463.60

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Solution

The fourth proportional to 647,951.20, 971,926.80 and 411,463.60 is: 617,195.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,951.20 : 971,926.80 = 411,463.60 : x
  2. Step 2: Convert to fraction form
    647,951.20/971,926.80 = 411,463.60/x
  3. Step 3: Cross multiply
    647,951.20x = 971,926.80 × 411,463.60
  4. Step 4: Simplify right side
    647,951.20x = 399,912,500,064.48
  5. Step 5: Solve for x
    x = 399,912,500,064.48/647,951.20
  6. Step 6: Final answer
    x = 617,195.40

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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.