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Finding the Fourth Proportional to 647,591.70, 971,387.55 and 608,193.30

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Solution

The fourth proportional to 647,591.70, 971,387.55 and 608,193.30 is: 912,289.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,591.70 : 971,387.55 = 608,193.30 : x
  2. Step 2: Convert to fraction form
    647,591.70/971,387.55 = 608,193.30/x
  3. Step 3: Cross multiply
    647,591.70x = 971,387.55 × 608,193.30
  4. Step 4: Simplify right side
    647,591.70x = 590,791,399,613.42
  5. Step 5: Solve for x
    x = 590,791,399,613.42/647,591.70
  6. Step 6: Final answer
    x = 912,289.95

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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.