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Finding the Fourth Proportional to 646,767.41, 969,415.34 and 393,489.59

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Solution

The fourth proportional to 646,767.41, 969,415.34 and 393,489.59 is: 589,786.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,767.41 : 969,415.34 = 393,489.59 : x
  2. Step 2: Convert to fraction form
    646,767.41/969,415.34 = 393,489.59/x
  3. Step 3: Cross multiply
    646,767.41x = 969,415.34 × 393,489.59
  4. Step 4: Simplify right side
    646,767.41x = 381,454,837,861.79
  5. Step 5: Solve for x
    x = 381,454,837,861.79/646,767.41
  6. Step 6: Final answer
    x = 589,786.74

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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.