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Finding the Fourth Proportional to 447,515.71, 671,295.69 and 127,714.71

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Solution

The fourth proportional to 447,515.71, 671,295.69 and 127,714.71 is: 191,578.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,515.71 : 671,295.69 = 127,714.71 : x
  2. Step 2: Convert to fraction form
    447,515.71/671,295.69 = 127,714.71/x
  3. Step 3: Cross multiply
    447,515.71x = 671,295.69 × 127,714.71
  4. Step 4: Simplify right side
    447,515.71x = 85,734,334,372.60
  5. Step 5: Solve for x
    x = 85,734,334,372.60/447,515.71
  6. Step 6: Final answer
    x = 191,578.38

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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.