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Finding the Fourth Proportional to 680,554.98, 939,220.11 and 394,080.12

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Solution

The fourth proportional to 680,554.98, 939,220.11 and 394,080.12 is: 543,861.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,554.98 : 939,220.11 = 394,080.12 : x
  2. Step 2: Convert to fraction form
    680,554.98/939,220.11 = 394,080.12/x
  3. Step 3: Cross multiply
    680,554.98x = 939,220.11 × 394,080.12
  4. Step 4: Simplify right side
    680,554.98x = 370,127,973,655.21
  5. Step 5: Solve for x
    x = 370,127,973,655.21/680,554.98
  6. Step 6: Final answer
    x = 543,861.97

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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.