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Finding the Fourth Proportional to 619,813.80, 929,720.70 and 220,467.60

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Solution

The fourth proportional to 619,813.80, 929,720.70 and 220,467.60 is: 330,701.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,813.80 : 929,720.70 = 220,467.60 : x
  2. Step 2: Convert to fraction form
    619,813.80/929,720.70 = 220,467.60/x
  3. Step 3: Cross multiply
    619,813.80x = 929,720.70 × 220,467.60
  4. Step 4: Simplify right side
    619,813.80x = 204,973,291,399.32
  5. Step 5: Solve for x
    x = 204,973,291,399.32/619,813.80
  6. Step 6: Final answer
    x = 330,701.40

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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.