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Finding the Fourth Proportional to 351,661.38, 485,292 and 190,520.40

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Solution

The fourth proportional to 351,661.38, 485,292 and 190,520.40 is: 262,917.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,661.38 : 485,292 = 190,520.40 : x
  2. Step 2: Convert to fraction form
    351,661.38/485,292 = 190,520.40/x
  3. Step 3: Cross multiply
    351,661.38x = 485,292 × 190,520.40
  4. Step 4: Simplify right side
    351,661.38x = 92,458,025,956.80
  5. Step 5: Solve for x
    x = 92,458,025,956.80/351,661.38
  6. Step 6: Final answer
    x = 262,917.77

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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.