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Finding the Fourth Proportional to 427,236.93, 640,983.86 and 127,727.25

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Solution

The fourth proportional to 427,236.93, 640,983.86 and 127,727.25 is: 191,629.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,236.93 : 640,983.86 = 127,727.25 : x
  2. Step 2: Convert to fraction form
    427,236.93/640,983.86 = 127,727.25/x
  3. Step 3: Cross multiply
    427,236.93x = 640,983.86 × 127,727.25
  4. Step 4: Simplify right side
    427,236.93x = 81,871,105,093.55
  5. Step 5: Solve for x
    x = 81,871,105,093.55/427,236.93
  6. Step 6: Final answer
    x = 191,629.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.