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Finding the Fourth Proportional to 636,836.80, 957,328.80 and 451,134.40

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Solution

The fourth proportional to 636,836.80, 957,328.80 and 451,134.40 is: 678,170.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,836.80 : 957,328.80 = 451,134.40 : x
  2. Step 2: Convert to fraction form
    636,836.80/957,328.80 = 451,134.40/x
  3. Step 3: Cross multiply
    636,836.80x = 957,328.80 × 451,134.40
  4. Step 4: Simplify right side
    636,836.80x = 431,883,953,790.72
  5. Step 5: Solve for x
    x = 431,883,953,790.72/636,836.80
  6. Step 6: Final answer
    x = 678,170.54

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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.