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Finding the Fourth Proportional to 619,783.60, 929,675.40 and 519,400.30

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Solution

The fourth proportional to 619,783.60, 929,675.40 and 519,400.30 is: 779,100.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,783.60 : 929,675.40 = 519,400.30 : x
  2. Step 2: Convert to fraction form
    619,783.60/929,675.40 = 519,400.30/x
  3. Step 3: Cross multiply
    619,783.60x = 929,675.40 × 519,400.30
  4. Step 4: Simplify right side
    619,783.60x = 482,873,681,662.62
  5. Step 5: Solve for x
    x = 482,873,681,662.62/619,783.60
  6. Step 6: Final answer
    x = 779,100.45

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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.