Home / 620,629.40-930,944.10-221,283.20

Finding the Fourth Proportional to 620,629.40, 930,944.10 and 221,283.20

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Solution

The fourth proportional to 620,629.40, 930,944.10 and 221,283.20 is: 331,924.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,629.40 : 930,944.10 = 221,283.20 : x
  2. Step 2: Convert to fraction form
    620,629.40/930,944.10 = 221,283.20/x
  3. Step 3: Cross multiply
    620,629.40x = 930,944.10 × 221,283.20
  4. Step 4: Simplify right side
    620,629.40x = 206,002,289,469.12
  5. Step 5: Solve for x
    x = 206,002,289,469.12/620,629.40
  6. Step 6: Final answer
    x = 331,924.80

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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.