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Finding the Fourth Proportional to 680,568.75, 939,184.88 and 378,834.03

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Solution

The fourth proportional to 680,568.75, 939,184.88 and 378,834.03 is: 522,790.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,568.75 : 939,184.88 = 378,834.03 : x
  2. Step 2: Convert to fraction form
    680,568.75/939,184.88 = 378,834.03/x
  3. Step 3: Cross multiply
    680,568.75x = 939,184.88 × 378,834.03
  4. Step 4: Simplify right side
    680,568.75x = 355,795,191,111.30
  5. Step 5: Solve for x
    x = 355,795,191,111.30/680,568.75
  6. Step 6: Final answer
    x = 522,790.96

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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.