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Finding the Fourth Proportional to 521,806.80, 783,293.40 and 404,000.40

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Solution

The fourth proportional to 521,806.80, 783,293.40 and 404,000.40 is: 606,452.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,806.80 : 783,293.40 = 404,000.40 : x
  2. Step 2: Convert to fraction form
    521,806.80/783,293.40 = 404,000.40/x
  3. Step 3: Cross multiply
    521,806.80x = 783,293.40 × 404,000.40
  4. Step 4: Simplify right side
    521,806.80x = 316,450,846,917.36
  5. Step 5: Solve for x
    x = 316,450,846,917.36/521,806.80
  6. Step 6: Final answer
    x = 606,452.13

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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.