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Finding the Fourth Proportional to 643,816.03, 965,714.21 and 217,651.21

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Solution

The fourth proportional to 643,816.03, 965,714.21 and 217,651.21 is: 326,473.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,816.03 : 965,714.21 = 217,651.21 : x
  2. Step 2: Convert to fraction form
    643,816.03/965,714.21 = 217,651.21/x
  3. Step 3: Cross multiply
    643,816.03x = 965,714.21 × 217,651.21
  4. Step 4: Simplify right side
    643,816.03x = 210,188,866,320.69
  5. Step 5: Solve for x
    x = 210,188,866,320.69/643,816.03
  6. Step 6: Final answer
    x = 326,473.49

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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.