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Finding the Fourth Proportional to 422,185.40, 582,611.48 and 228,589.79

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Solution

The fourth proportional to 422,185.40, 582,611.48 and 228,589.79 is: 315,451.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,185.40 : 582,611.48 = 228,589.79 : x
  2. Step 2: Convert to fraction form
    422,185.40/582,611.48 = 228,589.79/x
  3. Step 3: Cross multiply
    422,185.40x = 582,611.48 × 228,589.79
  4. Step 4: Simplify right side
    422,185.40x = 133,179,031,808.78
  5. Step 5: Solve for x
    x = 133,179,031,808.78/422,185.40
  6. Step 6: Final answer
    x = 315,451.54

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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.