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Finding the Fourth Proportional to 422,927.31, 634,522.44 and 138,620.34

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Solution

The fourth proportional to 422,927.31, 634,522.44 and 138,620.34 is: 207,973.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,927.31 : 634,522.44 = 138,620.34 : x
  2. Step 2: Convert to fraction form
    422,927.31/634,522.44 = 138,620.34/x
  3. Step 3: Cross multiply
    422,927.31x = 634,522.44 × 138,620.34
  4. Step 4: Simplify right side
    422,927.31x = 87,957,716,370.43
  5. Step 5: Solve for x
    x = 87,957,716,370.43/422,927.31
  6. Step 6: Final answer
    x = 207,973.60

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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.