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Finding the Fourth Proportional to 422,769.60, 634,154.40 and 185,860.80

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Solution

The fourth proportional to 422,769.60, 634,154.40 and 185,860.80 is: 278,791.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,769.60 : 634,154.40 = 185,860.80 : x
  2. Step 2: Convert to fraction form
    422,769.60/634,154.40 = 185,860.80/x
  3. Step 3: Cross multiply
    422,769.60x = 634,154.40 × 185,860.80
  4. Step 4: Simplify right side
    422,769.60x = 117,864,444,107.52
  5. Step 5: Solve for x
    x = 117,864,444,107.52/422,769.60
  6. Step 6: Final answer
    x = 278,791.20

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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.