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Finding the Fourth Proportional to 521,961.70, 782,942.55 and 403,717.90

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Solution

The fourth proportional to 521,961.70, 782,942.55 and 403,717.90 is: 605,576.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,961.70 : 782,942.55 = 403,717.90 : x
  2. Step 2: Convert to fraction form
    521,961.70/782,942.55 = 403,717.90/x
  3. Step 3: Cross multiply
    521,961.70x = 782,942.55 × 403,717.90
  4. Step 4: Simplify right side
    521,961.70x = 316,087,922,106.65
  5. Step 5: Solve for x
    x = 316,087,922,106.65/521,961.70
  6. Step 6: Final answer
    x = 605,576.85

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.