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Finding the Fourth Proportional to 641,540.70, 885,227.55 and 369,555.48

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Solution

The fourth proportional to 641,540.70, 885,227.55 and 369,555.48 is: 509,929.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,540.70 : 885,227.55 = 369,555.48 : x
  2. Step 2: Convert to fraction form
    641,540.70/885,227.55 = 369,555.48/x
  3. Step 3: Cross multiply
    641,540.70x = 885,227.55 × 369,555.48
  4. Step 4: Simplify right side
    641,540.70x = 327,140,692,149.47
  5. Step 5: Solve for x
    x = 327,140,692,149.47/641,540.70
  6. Step 6: Final answer
    x = 509,929.76

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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.