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Finding the Fourth Proportional to 422,879.87, 634,252.28 and 123,290.40

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Solution

The fourth proportional to 422,879.87, 634,252.28 and 123,290.40 is: 184,915.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,879.87 : 634,252.28 = 123,290.40 : x
  2. Step 2: Convert to fraction form
    422,879.87/634,252.28 = 123,290.40/x
  3. Step 3: Cross multiply
    422,879.87x = 634,252.28 × 123,290.40
  4. Step 4: Simplify right side
    422,879.87x = 78,197,219,064.11
  5. Step 5: Solve for x
    x = 78,197,219,064.11/422,879.87
  6. Step 6: Final answer
    x = 184,915.92

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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.