Home / 422,914.12-634,372.26-142,628.20

Finding the Fourth Proportional to 422,914.12, 634,372.26 and 142,628.20

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Solution

The fourth proportional to 422,914.12, 634,372.26 and 142,628.20 is: 213,942.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,914.12 : 634,372.26 = 142,628.20 : x
  2. Step 2: Convert to fraction form
    422,914.12/634,372.26 = 142,628.20/x
  3. Step 3: Cross multiply
    422,914.12x = 634,372.26 × 142,628.20
  4. Step 4: Simplify right side
    422,914.12x = 90,479,373,573.73
  5. Step 5: Solve for x
    x = 90,479,373,573.73/422,914.12
  6. Step 6: Final answer
    x = 213,942.66

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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.