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Finding the Fourth Proportional to 663,983,998.80, 995,975,998.20 and 434,660,427.60

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Solution

The fourth proportional to 663,983,998.80, 995,975,998.20 and 434,660,427.60 is: 651,990,641.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,983,998.80 : 995,975,998.20 = 434,660,427.60 : x
  2. Step 2: Convert to fraction form
    663,983,998.80/995,975,998.20 = 434,660,427.60/x
  3. Step 3: Cross multiply
    663,983,998.80x = 995,975,998.20 × 434,660,427.60
  4. Step 4: Simplify right side
    663,983,998.80x = 432,911,353,256,948,864
  5. Step 5: Solve for x
    x = 432,911,353,256,948,864/663,983,998.80
  6. Step 6: Final answer
    x = 651,990,641.40

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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.