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Finding the Fourth Proportional to 693,604.44, 957,127.86 and 391,779

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Solution

The fourth proportional to 693,604.44, 957,127.86 and 391,779 is: 540,628.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,604.44 : 957,127.86 = 391,779 : x
  2. Step 2: Convert to fraction form
    693,604.44/957,127.86 = 391,779/x
  3. Step 3: Cross multiply
    693,604.44x = 957,127.86 × 391,779
  4. Step 4: Simplify right side
    693,604.44x = 374,982,595,862.94
  5. Step 5: Solve for x
    x = 374,982,595,862.94/693,604.44
  6. Step 6: Final answer
    x = 540,628.89

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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.