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Finding the Fourth Proportional to 621,968.80, 931,570.80 and 511,376.80

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Solution

The fourth proportional to 621,968.80, 931,570.80 and 511,376.80 is: 765,928.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,968.80 : 931,570.80 = 511,376.80 : x
  2. Step 2: Convert to fraction form
    621,968.80/931,570.80 = 511,376.80/x
  3. Step 3: Cross multiply
    621,968.80x = 931,570.80 × 511,376.80
  4. Step 4: Simplify right side
    621,968.80x = 476,383,694,677.44
  5. Step 5: Solve for x
    x = 476,383,694,677.44/621,968.80
  6. Step 6: Final answer
    x = 765,928.60

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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.