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Finding the Fourth Proportional to 647,352.20, 905,112.10 and 647,352.20

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Solution

The fourth proportional to 647,352.20, 905,112.10 and 647,352.20 is: 905,112.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,352.20 : 905,112.10 = 647,352.20 : x
  2. Step 2: Convert to fraction form
    647,352.20/905,112.10 = 647,352.20/x
  3. Step 3: Cross multiply
    647,352.20x = 905,112.10 × 647,352.20
  4. Step 4: Simplify right side
    647,352.20x = 585,926,309,181.62
  5. Step 5: Solve for x
    x = 585,926,309,181.62/647,352.20
  6. Step 6: Final answer
    x = 905,112.10

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Half scale
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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 (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.