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Finding the Fourth Proportional to 422,988.60, 634,329.30 and 212,556.60

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Solution

The fourth proportional to 422,988.60, 634,329.30 and 212,556.60 is: 318,757.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,988.60 : 634,329.30 = 212,556.60 : x
  2. Step 2: Convert to fraction form
    422,988.60/634,329.30 = 212,556.60/x
  3. Step 3: Cross multiply
    422,988.60x = 634,329.30 × 212,556.60
  4. Step 4: Simplify right side
    422,988.60x = 134,830,879,288.38
  5. Step 5: Solve for x
    x = 134,830,879,288.38/422,988.60
  6. Step 6: Final answer
    x = 318,757.71

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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.