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Finding the Fourth Proportional to 680,091.39, 938,510.96 and 393,605.73

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Solution

The fourth proportional to 680,091.39, 938,510.96 and 393,605.73 is: 543,167.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,091.39 : 938,510.96 = 393,605.73 : x
  2. Step 2: Convert to fraction form
    680,091.39/938,510.96 = 393,605.73/x
  3. Step 3: Cross multiply
    680,091.39x = 938,510.96 × 393,605.73
  4. Step 4: Simplify right side
    680,091.39x = 369,403,289,555.77
  5. Step 5: Solve for x
    x = 369,403,289,555.77/680,091.39
  6. Step 6: Final answer
    x = 543,167.13

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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.