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Finding the Fourth Proportional to 422,365.78, 582,879.30 and 231,379.12

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Solution

The fourth proportional to 422,365.78, 582,879.30 and 231,379.12 is: 319,311.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,365.78 : 582,879.30 = 231,379.12 : x
  2. Step 2: Convert to fraction form
    422,365.78/582,879.30 = 231,379.12/x
  3. Step 3: Cross multiply
    422,365.78x = 582,879.30 × 231,379.12
  4. Step 4: Simplify right side
    422,365.78x = 134,866,099,500.22
  5. Step 5: Solve for x
    x = 134,866,099,500.22/422,365.78
  6. Step 6: Final answer
    x = 319,311.14

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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.