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Finding the Fourth Proportional to 422,790.38, 634,197.11 and 123,263.72

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Solution

The fourth proportional to 422,790.38, 634,197.11 and 123,263.72 is: 184,898.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,790.38 : 634,197.11 = 123,263.72 : x
  2. Step 2: Convert to fraction form
    422,790.38/634,197.11 = 123,263.72/x
  3. Step 3: Cross multiply
    422,790.38x = 634,197.11 × 123,263.72
  4. Step 4: Simplify right side
    422,790.38x = 78,173,491,204.55
  5. Step 5: Solve for x
    x = 78,173,491,204.55/422,790.38
  6. Step 6: Final answer
    x = 184,898.94

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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.