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Finding the Fourth Proportional to 677,704.20, 935,195.67 and 391,207.20

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Solution

The fourth proportional to 677,704.20, 935,195.67 and 391,207.20 is: 539,845.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,704.20 : 935,195.67 = 391,207.20 : x
  2. Step 2: Convert to fraction form
    677,704.20/935,195.67 = 391,207.20/x
  3. Step 3: Cross multiply
    677,704.20x = 935,195.67 × 391,207.20
  4. Step 4: Simplify right side
    677,704.20x = 365,855,279,512.82
  5. Step 5: Solve for x
    x = 365,855,279,512.82/677,704.20
  6. Step 6: Final answer
    x = 539,845.08

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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.