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Finding the Fourth Proportional to 911,392.25, 1,257,715.32 and 503,520.39

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Solution

The fourth proportional to 911,392.25, 1,257,715.32 and 503,520.39 is: 694,854.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,392.25 : 1,257,715.32 = 503,520.39 : x
  2. Step 2: Convert to fraction form
    911,392.25/1,257,715.32 = 503,520.39/x
  3. Step 3: Cross multiply
    911,392.25x = 1,257,715.32 × 503,520.39
  4. Step 4: Simplify right side
    911,392.25x = 633,285,308,435.38
  5. Step 5: Solve for x
    x = 633,285,308,435.38/911,392.25
  6. Step 6: Final answer
    x = 694,854.83

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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.