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Finding the Fourth Proportional to 620,793.90, 931,190.85 and 221,885.10

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Solution

The fourth proportional to 620,793.90, 931,190.85 and 221,885.10 is: 332,827.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,793.90 : 931,190.85 = 221,885.10 : x
  2. Step 2: Convert to fraction form
    620,793.90/931,190.85 = 221,885.10/x
  3. Step 3: Cross multiply
    620,793.90x = 931,190.85 × 221,885.10
  4. Step 4: Simplify right side
    620,793.90x = 206,617,374,871.34
  5. Step 5: Solve for x
    x = 206,617,374,871.34/620,793.90
  6. Step 6: Final answer
    x = 332,827.65

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Double scale
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Similar ratio
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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.