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Finding the Fourth Proportional to 619,705.60, 929,558.40 and 519,322.30

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Solution

The fourth proportional to 619,705.60, 929,558.40 and 519,322.30 is: 778,983.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,705.60 : 929,558.40 = 519,322.30 : x
  2. Step 2: Convert to fraction form
    619,705.60/929,558.40 = 519,322.30/x
  3. Step 3: Cross multiply
    619,705.60x = 929,558.40 × 519,322.30
  4. Step 4: Simplify right side
    619,705.60x = 482,740,406,272.32
  5. Step 5: Solve for x
    x = 482,740,406,272.32/619,705.60
  6. Step 6: Final answer
    x = 778,983.45

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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.