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Finding the Fourth Proportional to 719,101.16, 992,314.98 and 396,813.80

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Solution

The fourth proportional to 719,101.16, 992,314.98 and 396,813.80 is: 547,578.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,101.16 : 992,314.98 = 396,813.80 : x
  2. Step 2: Convert to fraction form
    719,101.16/992,314.98 = 396,813.80/x
  3. Step 3: Cross multiply
    719,101.16x = 992,314.98 × 396,813.80
  4. Step 4: Simplify right side
    719,101.16x = 393,764,278,010.72
  5. Step 5: Solve for x
    x = 393,764,278,010.72/719,101.16
  6. Step 6: Final answer
    x = 547,578.42

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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.