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Finding the Fourth Proportional to 580,078.51, 800,655.48 and 396,391.43

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Solution

The fourth proportional to 580,078.51, 800,655.48 and 396,391.43 is: 547,120.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    580,078.51 : 800,655.48 = 396,391.43 : x
  2. Step 2: Convert to fraction form
    580,078.51/800,655.48 = 396,391.43/x
  3. Step 3: Cross multiply
    580,078.51x = 800,655.48 × 396,391.43
  4. Step 4: Simplify right side
    580,078.51x = 317,372,970,654.54
  5. Step 5: Solve for x
    x = 317,372,970,654.54/580,078.51
  6. Step 6: Final answer
    x = 547,120.72

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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.