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Finding the Fourth Proportional to 675,274.20, 936,140.15 and 639,319.92

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Solution

The fourth proportional to 675,274.20, 936,140.15 and 639,319.92 is: 886,296.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,274.20 : 936,140.15 = 639,319.92 : x
  2. Step 2: Convert to fraction form
    675,274.20/936,140.15 = 639,319.92/x
  3. Step 3: Cross multiply
    675,274.20x = 936,140.15 × 639,319.92
  4. Step 4: Simplify right side
    675,274.20x = 598,493,042,610.19
  5. Step 5: Solve for x
    x = 598,493,042,610.19/675,274.20
  6. Step 6: Final answer
    x = 886,296.33

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.