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Finding the Fourth Proportional to 722,091.19, 996,516.99 and 399,801.30

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Solution

The fourth proportional to 722,091.19, 996,516.99 and 399,801.30 is: 551,743.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,091.19 : 996,516.99 = 399,801.30 : x
  2. Step 2: Convert to fraction form
    722,091.19/996,516.99 = 399,801.30/x
  3. Step 3: Cross multiply
    722,091.19x = 996,516.99 × 399,801.30
  4. Step 4: Simplify right side
    722,091.19x = 398,408,788,074.09
  5. Step 5: Solve for x
    x = 398,408,788,074.09/722,091.19
  6. Step 6: Final answer
    x = 551,743.04

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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.