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Finding the Fourth Proportional to 721,366.64, 995,560.80 and 415,453.92

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Solution

The fourth proportional to 721,366.64, 995,560.80 and 415,453.92 is: 573,369.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,366.64 : 995,560.80 = 415,453.92 : x
  2. Step 2: Convert to fraction form
    721,366.64/995,560.80 = 415,453.92/x
  3. Step 3: Cross multiply
    721,366.64x = 995,560.80 × 415,453.92
  4. Step 4: Simplify right side
    721,366.64x = 413,609,636,958.34
  5. Step 5: Solve for x
    x = 413,609,636,958.34/721,366.64
  6. Step 6: Final answer
    x = 573,369.51

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.