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Finding the Fourth Proportional to 422,659.44, 633,927.85 and 138,361.26

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Solution

The fourth proportional to 422,659.44, 633,927.85 and 138,361.26 is: 207,521.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,659.44 : 633,927.85 = 138,361.26 : x
  2. Step 2: Convert to fraction form
    422,659.44/633,927.85 = 138,361.26/x
  3. Step 3: Cross multiply
    422,659.44x = 633,927.85 × 138,361.26
  4. Step 4: Simplify right side
    422,659.44x = 87,711,056,075.09
  5. Step 5: Solve for x
    x = 87,711,056,075.09/422,659.44
  6. Step 6: Final answer
    x = 207,521.82

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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.