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Finding the Fourth Proportional to 716,257.89, 988,451.64 and 393,984.27

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Solution

The fourth proportional to 716,257.89, 988,451.64 and 393,984.27 is: 543,706.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,257.89 : 988,451.64 = 393,984.27 : x
  2. Step 2: Convert to fraction form
    716,257.89/988,451.64 = 393,984.27/x
  3. Step 3: Cross multiply
    716,257.89x = 988,451.64 × 393,984.27
  4. Step 4: Simplify right side
    716,257.89x = 389,434,397,815.70
  5. Step 5: Solve for x
    x = 389,434,397,815.70/716,257.89
  6. Step 6: Final answer
    x = 543,706.96

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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.