Home / 422,923.87-634,517.32-138,616.91

Finding the Fourth Proportional to 422,923.87, 634,517.32 and 138,616.91

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Solution

The fourth proportional to 422,923.87, 634,517.32 and 138,616.91 is: 207,968.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,923.87 : 634,517.32 = 138,616.91 : x
  2. Step 2: Convert to fraction form
    422,923.87/634,517.32 = 138,616.91/x
  3. Step 3: Cross multiply
    422,923.87x = 634,517.32 × 138,616.91
  4. Step 4: Simplify right side
    422,923.87x = 87,954,830,239.88
  5. Step 5: Solve for x
    x = 87,954,830,239.88/422,923.87
  6. Step 6: Final answer
    x = 207,968.47

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1.5x scale

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.