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Finding the Fourth Proportional to 651,796.60, 977,694.90 and 427,847.80

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Solution

The fourth proportional to 651,796.60, 977,694.90 and 427,847.80 is: 641,771.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,796.60 : 977,694.90 = 427,847.80 : x
  2. Step 2: Convert to fraction form
    651,796.60/977,694.90 = 427,847.80/x
  3. Step 3: Cross multiply
    651,796.60x = 977,694.90 × 427,847.80
  4. Step 4: Simplify right side
    651,796.60x = 418,304,612,036.22
  5. Step 5: Solve for x
    x = 418,304,612,036.22/651,796.60
  6. Step 6: Final answer
    x = 641,771.70

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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.