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Finding the Fourth Proportional to 718,191.03, 991,103.22 and 395,906.50

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Solution

The fourth proportional to 718,191.03, 991,103.22 and 395,906.50 is: 546,350.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,191.03 : 991,103.22 = 395,906.50 : x
  2. Step 2: Convert to fraction form
    718,191.03/991,103.22 = 395,906.50/x
  3. Step 3: Cross multiply
    718,191.03x = 991,103.22 × 395,906.50
  4. Step 4: Simplify right side
    718,191.03x = 392,384,204,491.17
  5. Step 5: Solve for x
    x = 392,384,204,491.17/718,191.03
  6. Step 6: Final answer
    x = 546,350.75

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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.