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Finding the Fourth Proportional to 620,190.90, 930,286.35 and 221,282.10

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Solution

The fourth proportional to 620,190.90, 930,286.35 and 221,282.10 is: 331,923.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,190.90 : 930,286.35 = 221,282.10 : x
  2. Step 2: Convert to fraction form
    620,190.90/930,286.35 = 221,282.10/x
  3. Step 3: Cross multiply
    620,190.90x = 930,286.35 × 221,282.10
  4. Step 4: Simplify right side
    620,190.90x = 205,855,717,129.34
  5. Step 5: Solve for x
    x = 205,855,717,129.34/620,190.90
  6. Step 6: Final answer
    x = 331,923.15

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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.