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Finding the Fourth Proportional to 422,611.21, 634,479.90 and 245,245.51

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Solution

The fourth proportional to 422,611.21, 634,479.90 and 245,245.51 is: 368,195.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,611.21 : 634,479.90 = 245,245.51 : x
  2. Step 2: Convert to fraction form
    422,611.21/634,479.90 = 245,245.51/x
  3. Step 3: Cross multiply
    422,611.21x = 634,479.90 × 245,245.51
  4. Step 4: Simplify right side
    422,611.21x = 155,603,346,660.25
  5. Step 5: Solve for x
    x = 155,603,346,660.25/422,611.21
  6. Step 6: Final answer
    x = 368,195.03

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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.