Home / 422,143.20-634,136.40-297,727.20

Finding the Fourth Proportional to 422,143.20, 634,136.40 and 297,727.20

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Solution

The fourth proportional to 422,143.20, 634,136.40 and 297,727.20 is: 447,240.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,143.20 : 634,136.40 = 297,727.20 : x
  2. Step 2: Convert to fraction form
    422,143.20/634,136.40 = 297,727.20/x
  3. Step 3: Cross multiply
    422,143.20x = 634,136.40 × 297,727.20
  4. Step 4: Simplify right side
    422,143.20x = 188,799,654,790.08
  5. Step 5: Solve for x
    x = 188,799,654,790.08/422,143.20
  6. Step 6: Final answer
    x = 447,240.78

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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.