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Finding the Fourth Proportional to 621,141.80, 857,155.83 and 349,221.20

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Solution

The fourth proportional to 621,141.80, 857,155.83 and 349,221.20 is: 481,914.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,141.80 : 857,155.83 = 349,221.20 : x
  2. Step 2: Convert to fraction form
    621,141.80/857,155.83 = 349,221.20/x
  3. Step 3: Cross multiply
    621,141.80x = 857,155.83 × 349,221.20
  4. Step 4: Simplify right side
    621,141.80x = 299,336,987,539.60
  5. Step 5: Solve for x
    x = 299,336,987,539.60/621,141.80
  6. Step 6: Final answer
    x = 481,914.09

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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.