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Finding the Fourth Proportional to 619,651.60, 929,477.40 and 383,261.20

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Solution

The fourth proportional to 619,651.60, 929,477.40 and 383,261.20 is: 574,891.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,651.60 : 929,477.40 = 383,261.20 : x
  2. Step 2: Convert to fraction form
    619,651.60/929,477.40 = 383,261.20/x
  3. Step 3: Cross multiply
    619,651.60x = 929,477.40 × 383,261.20
  4. Step 4: Simplify right side
    619,651.60x = 356,232,623,696.88
  5. Step 5: Solve for x
    x = 356,232,623,696.88/619,651.60
  6. Step 6: Final answer
    x = 574,891.80

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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.