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Finding the Fourth Proportional to 663,511.78, 995,267.64 and 220,279.78

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Solution

The fourth proportional to 663,511.78, 995,267.64 and 220,279.78 is: 330,419.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,511.78 : 995,267.64 = 220,279.78 : x
  2. Step 2: Convert to fraction form
    663,511.78/995,267.64 = 220,279.78/x
  3. Step 3: Cross multiply
    663,511.78x = 995,267.64 × 220,279.78
  4. Step 4: Simplify right side
    663,511.78x = 219,237,336,780.32
  5. Step 5: Solve for x
    x = 219,237,336,780.32/663,511.78
  6. Step 6: Final answer
    x = 330,419.66

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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.