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Finding the Fourth Proportional to 642,611.09, 886,797.79 and 352,238.78

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Solution

The fourth proportional to 642,611.09, 886,797.79 and 352,238.78 is: 486,086.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,611.09 : 886,797.79 = 352,238.78 : x
  2. Step 2: Convert to fraction form
    642,611.09/886,797.79 = 352,238.78/x
  3. Step 3: Cross multiply
    642,611.09x = 886,797.79 × 352,238.78
  4. Step 4: Simplify right side
    642,611.09x = 312,364,568,004.46
  5. Step 5: Solve for x
    x = 312,364,568,004.46/642,611.09
  6. Step 6: Final answer
    x = 486,086.49

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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.