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Finding the Fourth Proportional to 680,563.98, 939,232.53 and 394,089.12

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Solution

The fourth proportional to 680,563.98, 939,232.53 and 394,089.12 is: 543,874.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,563.98 : 939,232.53 = 394,089.12 : x
  2. Step 2: Convert to fraction form
    680,563.98/939,232.53 = 394,089.12/x
  3. Step 3: Cross multiply
    680,563.98x = 939,232.53 × 394,089.12
  4. Step 4: Simplify right side
    680,563.98x = 370,141,321,223.07
  5. Step 5: Solve for x
    x = 370,141,321,223.07/680,563.98
  6. Step 6: Final answer
    x = 543,874.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.