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Finding the Fourth Proportional to 419,215.20, 628,822.80 and 400,844.40

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Solution

The fourth proportional to 419,215.20, 628,822.80 and 400,844.40 is: 601,266.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,215.20 : 628,822.80 = 400,844.40 : x
  2. Step 2: Convert to fraction form
    419,215.20/628,822.80 = 400,844.40/x
  3. Step 3: Cross multiply
    419,215.20x = 628,822.80 × 400,844.40
  4. Step 4: Simplify right side
    419,215.20x = 252,060,097,972.32
  5. Step 5: Solve for x
    x = 252,060,097,972.32/419,215.20
  6. Step 6: Final answer
    x = 601,266.60

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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.