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Finding the Fourth Proportional to 641,679.78, 885,507.33 and 355,193.70

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Solution

The fourth proportional to 641,679.78, 885,507.33 and 355,193.70 is: 490,161.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,679.78 : 885,507.33 = 355,193.70 : x
  2. Step 2: Convert to fraction form
    641,679.78/885,507.33 = 355,193.70/x
  3. Step 3: Cross multiply
    641,679.78x = 885,507.33 × 355,193.70
  4. Step 4: Simplify right side
    641,679.78x = 314,526,624,919.82
  5. Step 5: Solve for x
    x = 314,526,624,919.82/641,679.78
  6. Step 6: Final answer
    x = 490,161.35

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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.