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Finding the Fourth Proportional to 647,786.85, 971,652.21 and 221,360.73

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Solution

The fourth proportional to 647,786.85, 971,652.21 and 221,360.73 is: 332,031.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,786.85 : 971,652.21 = 221,360.73 : x
  2. Step 2: Convert to fraction form
    647,786.85/971,652.21 = 221,360.73/x
  3. Step 3: Cross multiply
    647,786.85x = 971,652.21 × 221,360.73
  4. Step 4: Simplify right side
    647,786.85x = 215,085,642,511.71
  5. Step 5: Solve for x
    x = 215,085,642,511.71/647,786.85
  6. Step 6: Final answer
    x = 332,031.50

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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.