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Finding the Fourth Proportional to 636,306.20, 878,093.10 and 345,908.12

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Solution

The fourth proportional to 636,306.20, 878,093.10 and 345,908.12 is: 477,348.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,306.20 : 878,093.10 = 345,908.12 : x
  2. Step 2: Convert to fraction form
    636,306.20/878,093.10 = 345,908.12/x
  3. Step 3: Cross multiply
    636,306.20x = 878,093.10 × 345,908.12
  4. Step 4: Simplify right side
    636,306.20x = 303,739,533,405.97
  5. Step 5: Solve for x
    x = 303,739,533,405.97/636,306.20
  6. Step 6: Final answer
    x = 477,348.07

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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.