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Finding the Fourth Proportional to 641,202.30, 961,803.45 and 613,899.90

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Solution

The fourth proportional to 641,202.30, 961,803.45 and 613,899.90 is: 920,849.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,202.30 : 961,803.45 = 613,899.90 : x
  2. Step 2: Convert to fraction form
    641,202.30/961,803.45 = 613,899.90/x
  3. Step 3: Cross multiply
    641,202.30x = 961,803.45 × 613,899.90
  4. Step 4: Simplify right side
    641,202.30x = 590,451,041,774.66
  5. Step 5: Solve for x
    x = 590,451,041,774.66/641,202.30
  6. Step 6: Final answer
    x = 920,849.85

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