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Finding the Fourth Proportional to 620,757.60, 930,917.70 and 221,411.40

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Solution

The fourth proportional to 620,757.60, 930,917.70 and 221,411.40 is: 332,039.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,757.60 : 930,917.70 = 221,411.40 : x
  2. Step 2: Convert to fraction form
    620,757.60/930,917.70 = 221,411.40/x
  3. Step 3: Cross multiply
    620,757.60x = 930,917.70 × 221,411.40
  4. Step 4: Simplify right side
    620,757.60x = 206,115,791,241.78
  5. Step 5: Solve for x
    x = 206,115,791,241.78/620,757.60
  6. Step 6: Final answer
    x = 332,039.09

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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.