Home / 422,923.74-634,517.15-138,616.78

Finding the Fourth Proportional to 422,923.74, 634,517.15 and 138,616.78

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Solution

The fourth proportional to 422,923.74, 634,517.15 and 138,616.78 is: 207,968.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,923.74 : 634,517.15 = 138,616.78 : x
  2. Step 2: Convert to fraction form
    422,923.74/634,517.15 = 138,616.78/x
  3. Step 3: Cross multiply
    422,923.74x = 634,517.15 × 138,616.78
  4. Step 4: Simplify right side
    422,923.74x = 87,954,721,908.40
  5. Step 5: Solve for x
    x = 87,954,721,908.40/422,923.74
  6. Step 6: Final answer
    x = 207,968.28

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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.