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Finding the Fourth Proportional to 718,900.80, 992,083.19 and 396,611.66

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Solution

The fourth proportional to 718,900.80, 992,083.19 and 396,611.66 is: 547,324.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,900.80 : 992,083.19 = 396,611.66 : x
  2. Step 2: Convert to fraction form
    718,900.80/992,083.19 = 396,611.66/x
  3. Step 3: Cross multiply
    718,900.80x = 992,083.19 × 396,611.66
  4. Step 4: Simplify right side
    718,900.80x = 393,471,753,900.52
  5. Step 5: Solve for x
    x = 393,471,753,900.52/718,900.80
  6. Step 6: Final answer
    x = 547,324.13

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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.