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Finding the Fourth Proportional to 664,457.20, 996,685.80 and 613,135.60

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Solution

The fourth proportional to 664,457.20, 996,685.80 and 613,135.60 is: 919,703.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,457.20 : 996,685.80 = 613,135.60 : x
  2. Step 2: Convert to fraction form
    664,457.20/996,685.80 = 613,135.60/x
  3. Step 3: Cross multiply
    664,457.20x = 996,685.80 × 613,135.60
  4. Step 4: Simplify right side
    664,457.20x = 611,103,545,994.48
  5. Step 5: Solve for x
    x = 611,103,545,994.48/664,457.20
  6. Step 6: Final answer
    x = 919,703.40

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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.