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Finding the Fourth Proportional to 519,554.91, 717,480.92 and 491,249.82

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Solution

The fourth proportional to 519,554.91, 717,480.92 and 491,249.82 is: 678,392.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,554.91 : 717,480.92 = 491,249.82 : x
  2. Step 2: Convert to fraction form
    519,554.91/717,480.92 = 491,249.82/x
  3. Step 3: Cross multiply
    519,554.91x = 717,480.92 × 491,249.82
  4. Step 4: Simplify right side
    519,554.91x = 352,462,374,597.14
  5. Step 5: Solve for x
    x = 352,462,374,597.14/519,554.91
  6. Step 6: Final answer
    x = 678,392.93

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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.