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Finding the Fourth Proportional to 619,796.40, 929,694.60 and 430,839.60

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Solution

The fourth proportional to 619,796.40, 929,694.60 and 430,839.60 is: 646,259.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,796.40 : 929,694.60 = 430,839.60 : x
  2. Step 2: Convert to fraction form
    619,796.40/929,694.60 = 430,839.60/x
  3. Step 3: Cross multiply
    619,796.40x = 929,694.60 × 430,839.60
  4. Step 4: Simplify right side
    619,796.40x = 400,549,249,586.16
  5. Step 5: Solve for x
    x = 400,549,249,586.16/619,796.40
  6. Step 6: Final answer
    x = 646,259.40

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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.