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Finding the Fourth Proportional to 620,800.80, 931,201.20 and 221,454.60

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Solution

The fourth proportional to 620,800.80, 931,201.20 and 221,454.60 is: 332,181.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,800.80 : 931,201.20 = 221,454.60 : x
  2. Step 2: Convert to fraction form
    620,800.80/931,201.20 = 221,454.60/x
  3. Step 3: Cross multiply
    620,800.80x = 931,201.20 × 221,454.60
  4. Step 4: Simplify right side
    620,800.80x = 206,218,789,265.52
  5. Step 5: Solve for x
    x = 206,218,789,265.52/620,800.80
  6. Step 6: Final answer
    x = 332,181.90

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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.