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Finding the Fourth Proportional to 657,994.20, 986,991.30 and 647,496.60

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Solution

The fourth proportional to 657,994.20, 986,991.30 and 647,496.60 is: 971,244.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,994.20 : 986,991.30 = 647,496.60 : x
  2. Step 2: Convert to fraction form
    657,994.20/986,991.30 = 647,496.60/x
  3. Step 3: Cross multiply
    657,994.20x = 986,991.30 × 647,496.60
  4. Step 4: Simplify right side
    657,994.20x = 639,073,510,979.58
  5. Step 5: Solve for x
    x = 639,073,510,979.58/657,994.20
  6. Step 6: Final answer
    x = 971,244.90

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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.