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Finding the Fourth Proportional to 619,692.60, 929,538.90 and 407,116.20

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Solution

The fourth proportional to 619,692.60, 929,538.90 and 407,116.20 is: 610,674.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,692.60 : 929,538.90 = 407,116.20 : x
  2. Step 2: Convert to fraction form
    619,692.60/929,538.90 = 407,116.20/x
  3. Step 3: Cross multiply
    619,692.60x = 929,538.90 × 407,116.20
  4. Step 4: Simplify right side
    619,692.60x = 378,430,344,720.18
  5. Step 5: Solve for x
    x = 378,430,344,720.18/619,692.60
  6. Step 6: Final answer
    x = 610,674.30

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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.