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Finding the Fourth Proportional to 621,116.57, 857,120.86 and 349,195.88

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Solution

The fourth proportional to 621,116.57, 857,120.86 and 349,195.88 is: 481,879.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,116.57 : 857,120.86 = 349,195.88 : x
  2. Step 2: Convert to fraction form
    621,116.57/857,120.86 = 349,195.88/x
  3. Step 3: Cross multiply
    621,116.57x = 857,120.86 × 349,195.88
  4. Step 4: Simplify right side
    621,116.57x = 299,303,067,815.46
  5. Step 5: Solve for x
    x = 299,303,067,815.46/621,116.57
  6. Step 6: Final answer
    x = 481,879.06

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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.