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Finding the Fourth Proportional to 620,801.60, 930,983.70 and 221,455.40

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Solution

The fourth proportional to 620,801.60, 930,983.70 and 221,455.40 is: 332,105.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,801.60 : 930,983.70 = 221,455.40 : x
  2. Step 2: Convert to fraction form
    620,801.60/930,983.70 = 221,455.40/x
  3. Step 3: Cross multiply
    620,801.60x = 930,983.70 × 221,455.40
  4. Step 4: Simplify right side
    620,801.60x = 206,171,367,676.98
  5. Step 5: Solve for x
    x = 206,171,367,676.98/620,801.60
  6. Step 6: Final answer
    x = 332,105.08

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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.